1
|
Zhou W, Lu X, Lu J, Zhang Q, Fu X, Sun X, Guo X, Lu Y. Parental willingness to pay and preference for human papillomavirus vaccine for girls aged 9-14 in subsidy scenarios in Shanghai, China. Hum Vaccin Immunother 2024; 20:2372883. [PMID: 38977424 PMCID: PMC11232639 DOI: 10.1080/21645515.2024.2372883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2024] [Accepted: 06/23/2024] [Indexed: 07/10/2024] Open
Abstract
Multiple studies have documented low human papillomavirus (HPV) vaccine uptake among Chinese girls. It remains crucial to determine the parental willingness to pay (WTP) HPV vaccine for girls. We conducted a cross-sectional study recruiting 3904 parents with girls aged 9-14 in Shanghai, China, employing an online questionnaire with a convenience sampling strategy. Parental WTP, both range of payment and estimated point value, were determined for themselves (or wives) and daughters. HPV vaccine uptake was 22.44% in mothers and 3.21% in daughters. Respondents favored WTP ≤ 1000 CNY/138 USD for themselves (or wives), whereas showed increasing WTP along with valency of HPV vaccine for daughters (2-valent: 68.62% ≤1000 CNY/138 USD; 4-valent: 56.27% 1001-2000 CNY/138-277 USD; 9-valent: 65.37% ≥2001 CNY/277 USD). Overall, respondents showed higher WTP for daughters (median 2000 CNY/277 USD; IQR 1000-3600 CNY/138-498 USD) than for themselves (2000 CNY/277 USD; 1000-3500 CNY/138-483 USD) or wives (2000 CNY/277 USD; 800-3000 CNY/110-414 USD) (each p < .05). Furthermore, parental WTP was higher for international vaccine and 9-valent vaccine (each p < 0.05). Between two assumed government subsidy scenarios, parental preference for 9-valent vaccine remained consistently high for daughters (approximately 24% in each scenario), whereas preference for themselves (or wives) was sensitive to payment change between the subsidy scenarios. Using a discrete choice experiment, we found domestic vaccine was commonly preferred; however, certain sociodemographic groups preferred multivalent HPV vaccines. In conclusion, the valency of HPV vaccine may influence parental decision-making for daughters, in addition to vaccine price. Our findings would facilitate tailoring the HPV immunization program in China.
Collapse
Affiliation(s)
- Weiyu Zhou
- Department of Epidemiology, Ministry of Education Key Laboratory of Public Health Safety, School of Public Health, Fudan University, Shanghai, China
| | - Xinyue Lu
- Department of Epidemiology, Ministry of Education Key Laboratory of Public Health Safety, School of Public Health, Fudan University, Shanghai, China
| | - Jia Lu
- Department of Immunization Planning, Minhang District Center for Disease Control and Prevention, Shanghai, China
| | - Qian Zhang
- Department of Immunization Planning, Jiading District Center for Disease Control and Prevention, Shanghai, China
| | - Xiaoya Fu
- Department of Epidemiology, Ministry of Education Key Laboratory of Public Health Safety, School of Public Health, Fudan University, Shanghai, China
| | - Xiaodong Sun
- Institute of Immunization Planning, Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - Xiang Guo
- Institute of Immunization Planning, Shanghai Municipal Center for Disease Control and Prevention, Shanghai, China
| | - Yihan Lu
- Department of Epidemiology, Ministry of Education Key Laboratory of Public Health Safety, School of Public Health, Fudan University, Shanghai, China
| |
Collapse
|
2
|
Bornstein J, Sacinti KG, Preti M, Billan S, Razeghian H, Stockdale CK. Changing the paradigm: Elimination - Not only of cervical cancer. Gynecol Oncol Rep 2024; 54:101445. [PMID: 39045263 PMCID: PMC11263942 DOI: 10.1016/j.gore.2024.101445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2024] [Revised: 06/12/2024] [Accepted: 06/26/2024] [Indexed: 07/25/2024] Open
Abstract
The WHO's initiative to eliminate cervical cancer by 2030 does not address the increasing incidence of vulvar, anal, and oropharyngeal cancers linked to high-risk HPV. Currently, the prevention of these three cancers faces various obstacles, such as a lack of specialized screening programs, well-defined management guidelines, and widespread public awareness. Without any interventions, the incidence of these three cancers will likely rise in the upcoming years, increasingly affecting younger individuals. We recommend expanding the WHO's initiative to include vulvar, anal, and oropharyngeal cancers. This involves developing screening and management protocols similar to those for cervical cancer, implementing gender-neutral HPV vaccination programs, establishing clear referral pathways to specialized centers, promoting public awareness, and providing education to healthcare providers and high-risk individuals.
Collapse
Affiliation(s)
- Jacob Bornstein
- The Research Institute of Galilee Medical Center, Galilee Medical Center, Nahariya, Israel
- Department of Obstetrics and Gynecology, Azrieli Faculty of Medicine of Bar-Ilan University, Nahariya, Israel
| | - Koray Gorkem Sacinti
- Department of Obstetrics and Gynecology, Ankara University School of Medicine, Ankara, Turkey
- Division of Epidemiology, Department of Public Health, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Mario Preti
- Department of Surgical Sciences, University of Torino, Torino, Italy
| | - Salem Billan
- Department of Oncology and Radiation, Head and Neck Center, Rambam Health Care Campus, Israel Institute of Technology, Haifa 31096, Israel
| | - Hosna Razeghian
- Luigi Vanvitelli University of Campania School of Medicine and Surgery, Naples, Italy
| | | |
Collapse
|
3
|
Tobaiqy M, MacLure K. A Systematic Review of Human Papillomavirus Vaccination Challenges and Strategies to Enhance Uptake. Vaccines (Basel) 2024; 12:746. [PMID: 39066384 PMCID: PMC11281456 DOI: 10.3390/vaccines12070746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2024] [Revised: 06/27/2024] [Accepted: 07/03/2024] [Indexed: 07/28/2024] Open
Abstract
Human papillomavirus (HPV) vaccination has revolutionized cervical cancer prevention. Clinical trials confirm that the quadrivalent (HPV types 6, 11, 16, 18) and bivalent (HPV types 16, 18) vaccines effectively prevent HPV infections and cervical neoplasia. The latest HPV vaccine protects against nine virus types responsible for 90% of cervical cancer cases globally. Despite their undoubted effectiveness in reducing morbidity and mortality associated with HPV infections, challenges in vaccine coverage and uptake persist. The current study aimed to identify the primary challenges associated with HPV vaccination, propose effective strategies to improve vaccination uptake, and compile relevant evidence into a comprehensive overview to inform policy and practice. A systematic review protocol, following PRISMA-P and PRISMA guidelines, was established. Articles were sourced from the Web of Science using keywords from a comprehensive review of HPV vaccination challenges and strategies. Studies published between 1 January 2020, and 1 May 2024, including RCTs and observational, qualitative, and cross-sectional studies, were included, while reviews, protocols, and commentaries were excluded. Titles, abstracts, and full texts were screened per PRISMA guidelines. The review identified five key strategies to improve HPV vaccination uptake: parental and school engagement, use of technology and multimedia tools, healthcare providers' role, multicomponent interventions, and targeted interventions for immigrant groups. This review emphasized the need for a multifaceted approach to improving vaccination rates, offering a robust foundation for policy and stakeholder initiatives.
Collapse
Affiliation(s)
- Mansour Tobaiqy
- Department of Pharmacology, College of Medicine, University of Jeddah, Jeddah P.O. Box 45311, Saudi Arabia
| | | |
Collapse
|
4
|
Okoli GN, Neilson CJ, Grossman Moon A, Kimmel Supron H, Soos AE, Grewal A, Etsell K, Alessi-Severini S, Richardson C, Harper DM. Exploration of individual socioeconomic and health-related characteristics associated with human papillomavirus vaccination initiation and vaccination series completion among adult females: A comprehensive systematic evidence review with meta-analysis. Vaccine 2024:S0264-410X(24)00601-7. [PMID: 38796328 DOI: 10.1016/j.vaccine.2024.05.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 05/08/2024] [Accepted: 05/20/2024] [Indexed: 05/28/2024]
Abstract
INTRODUCTION Human papillomavirus (HPV) vaccination rates among females are lower than the World Health Organization target and vaccination rates specifically among adult females are even much lower. METHODS We systematically evaluated individual socioeconomic and health-related characteristics associated with HPV vaccination initiation and vaccination series completion among adult females (PROSPERO: CRD42023445721). We performed a literature search on December 14, 2022, and supplemented the search on August 1, 2023. We pooled appropriate multivariable-adjusted results using an inverse variance random-effects model and expressed the results as odds ratios with associated 95 % confidence intervals. A point pooled significantly increased/decreased odds of 30-69 % was regarded to be strongly associated, and ≥ 70 % was very strongly associated. RESULTS We included 63 cross-sectional studies. There were strongly increased odds of vaccination initiation among White women compared with Black or Asian women, and those with higher education, health insurance, a history of sexually transmitted infection (STI), receipt of influenza vaccination in the preceding year, not married/cohabiting, not smoking, using contraception, and having visited a healthcare provider in the preceding year. We observed very strongly increased odds of vaccination initiation among those younger and having been born in the country of study. Similarly, there were strongly increased odds of completing the vaccination series for the same variables as initiating vaccination, except for higher education, prior STI, smoking and contraception use. Additional variables associated with strongly increased odds of vaccination series completion not seen in initiation were higher annual household income, being lesbian/bisexual, and having a primary care physician. We observed very strongly increased odds of vaccination series completion similar to vaccination initiation but including for White compared with Black women, higher education, and prior cervical cancer screening. CONCLUSIONS These individual characteristics may be the key to identifying women at increased risk of not being vaccinated against HPV and could inform targeted messaging to drive HPV vaccination.
Collapse
Affiliation(s)
- George N Okoli
- Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada.
| | | | | | | | - Alexandra E Soos
- University of Michigan Medical School, University of Michigan, Michigan, USA
| | - Avneet Grewal
- University of Michigan Medical School, University of Michigan, Michigan, USA
| | - Katharine Etsell
- University of Michigan Medical School, University of Michigan, Michigan, USA
| | - Silvia Alessi-Severini
- College of Pharmacy, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Caroline Richardson
- The Warren Alpert Medical School, Brown University, Providence, Rhode Island, USA
| | - Diane M Harper
- Departments of Family Medicine and Obstetrics & Gynecology, University of Michigan, Michigan, USA
| |
Collapse
|
5
|
Maldonado I, Rodríguez Niño N, Valencia CF, Ortiz D, Ayala N, D'silva L, Castro Villarreal S, Salazar D, Lozano C, Angulo D. Evaluation of the safety profile of the quadrivalent vaccine against human papillomavirus in the risk of developing autoimmune, neurological, and hematological diseases in adolescent women in Colombia. Vaccine 2024; 42:2414-2420. [PMID: 38458869 DOI: 10.1016/j.vaccine.2024.02.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Revised: 01/16/2024] [Accepted: 02/27/2024] [Indexed: 03/10/2024]
Abstract
BACKGROUND Cervical cancer eradication is one of the main goals for 2030 by the World Health Organization, which can only be achieved with high vaccination rates against Human Papilloma Virus. In Colombia, more and better scientific evidence is required to increase confidence in vaccination. The objective of this study is to evaluate the safety profile of the quadrivalent vaccine against HPV in the risk of developing autoimmune, neurological, and hematological diseases in adolescent women in Colombia. METHODS We designed a cohort study based on national HPV vaccination records and incident diagnostic data for the diseases of special interest during 2012 and 2021. We included adolescent women between 9 and 19 years old and compared vaccinated and non-vaccinated cohorts using an Inverse Probability of Treatment Weighting (IPWT) method for each scenario disease and follow-up period (180 and 360 days). FINDINGS The Odds Ratio (OR) of developing diseases of interest was estimated during two follow up periods, 180 and 360 days after the follow-up index date (Vaccination Day). The OR for developing rheumatoid arthritis was 4·4; CI95% (1·74 - 11·14), juvenile idiopathic arthritis was 2·76 IC95% (1·50 - 5·11), idiopathic thrombocytopenic purpura was 2·54 IC95% (1·28 - 5·02) and thyrotoxicosis was 2·86 IC95% (1·03 - 7·95), when comparing the vaccinated versus unvaccinated population. However, the temporal distribution of cases incident did not reveal a clear difference between the cohorts, since the rate of appearance of new cases has a constant linear behavior for the two groups. INTERPRETATION For rheumatoid arthritis, juvenile idiopathic arthritis, idiopathic thrombocytopenic purpura, and thyrotoxicosis; the application of the vaccine had an effect on the development of the disease. Nevertheless, our results should be interpreted with caution and be further studied, considering that the biological plausibility of the events occurred without a clear temporal pattern in relation to the exposure to the vaccine.
Collapse
Affiliation(s)
- Ivette Maldonado
- Department of Gynecology, Obstetrics and Human Reproduction, Fundación Santa Fe de Bogotá, Bogotá, Colombia; School of Medicine, Universidad de Ios Andes, Bogotá, Colombia.
| | - Nicolas Rodríguez Niño
- Department of Gynecology, Obstetrics and Human Reproduction, Fundación Santa Fe de Bogotá, Bogotá, Colombia
| | - Carlos F Valencia
- Department of Industrial Engineering, Universidad de Ios Andes, Bogotá, Colombia
| | - Daniela Ortiz
- Department of Industrial Engineering, Universidad de Ios Andes, Bogotá, Colombia
| | - Nathalia Ayala
- School of Medicine, Universidad de Ios Andes, Bogotá, Colombia
| | - Liz D'silva
- School of Medicine, Universidad de Ios Andes, Bogotá, Colombia
| | | | - Diego Salazar
- Department of Industrial Engineering, Universidad de Ios Andes, Bogotá, Colombia
| | - Catalina Lozano
- Department of Industrial Engineering, Universidad de Ios Andes, Bogotá, Colombia
| | - Daniela Angulo
- Department of Industrial Engineering, Universidad de Ios Andes, Bogotá, Colombia; Department of Biostatistics, University of Michigan, Ann Arbor, United States
| |
Collapse
|
6
|
Kim J, Choe YJ, Park J, Cho J, Cheong C, Oh JK, Park M, Shim E, Yu SY. Comparative Effects of Bivalent, Quadrivalent, and Nonavalent Human Papillomavirus Vaccines in The Prevention of Genotype-Specific Infection: A Systematic Review and Network Meta-Analysis. Infect Chemother 2024; 56:37-46. [PMID: 38014729 PMCID: PMC10990884 DOI: 10.3947/ic.2023.0064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Accepted: 09/24/2023] [Indexed: 11/29/2023] Open
Abstract
BACKGROUND Human papillomavirus (HPV) infection is a major global disease burden and the main cause of cervical cancer. Certain HPV genotypes, with are the most common etiologic pathogens and cause a significant disease burden, are being targeted for vaccine development. However, few studies have focused on the comparative effectiveness of the bivalent HPV (2v-HPV), quadrivalent HPV (4v-HPV), and nonavalent HPV (9v-HPV) vaccines against HPV strain-specific infection. This study investigated the comparative effects of these vaccines against genotype-specific infection. MATERIALS AND METHODS We conducted a pairwise and network meta-analysis of published randomized clinical trials of HPV vaccines according to sex and HPV infection status for nine HPV genotypes (HPV 6/11/16/18/31/33/45/52/58). RESULTS Overall, 10 randomized controlled trials (12 articles) were included in this study. In the network meta-analysis, no statistically significant differences were observed in the prevention of carcinogenic HPV strains (16/18/31/33/45/52/58) between the 2v-HPV and 4v-HPV vaccines in female HPV infection-naïve populations. However, the 9v-HPV vaccine showed a significantly superior effect compared with 2v-HPV and 4v-HPV vaccines in preventing HPV 31/33/45/52/58 infections. Although 2v-HPV and 4v-HPV vaccines provided some cross-protection against HPV 31/33/45/52/58 infections, the effect was significant only on HPV 31 infection. For HPV 16 and 18, neither statistically significant nor small differences were found in the prevention of HPV infection among the 2v-HPV, 4v-HPV, and 9v-HPV vaccines. CONCLUSION Our study complements previous understanding of how the effect of HPV vaccines differs according to the HPV genotype. This is important because HPV genotype prevalence varies among countries. We advocate for continued efforts in vaccinating against HPV, while public health agencies should consider the difference in the vaccine effect and HPV genotype prevalence when implementing HPV vaccination in public vaccination programs.
Collapse
Affiliation(s)
- Jimin Kim
- Division for Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
| | - Young June Choe
- Department of Pediatrics, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Korea
| | - Jungeun Park
- Division for Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
| | - Jahyun Cho
- Graduate School of Public Health, Seoul National University, Seoul, Korea
| | | | - Jin-Kyoung Oh
- Department of Cancer Control and Population Health, National Cancer Center Graduate School of Cancer Science and Policy, Goyang, Korea
| | - Mihai Park
- School of Pharmacy, Sungkyunkwan University, Suwon, Korea
| | - Eunha Shim
- Department of Mathematics, Soongsil University, Seoul, Korea
| | - Su-Yeon Yu
- Division for Healthcare Technology Assessment Research, National Evidence-based Healthcare Collaborating Agency, Seoul, Korea
- Department of Medical Information, School of Nursing and Health, Kongju National University, Gongju, Korea.
| |
Collapse
|
7
|
Albayat SS, Mundodan JM, Elmardi K, Hasnain S, Khogali H, Baaboura R, Al-Romaihi HE, AlKubaisi NJ, Bougmiza MI. Knowledge, attitude, and practices regarding human papilloma virus vaccination among physicians in Qatar. WOMEN'S HEALTH (LONDON, ENGLAND) 2024; 20:17455057241227360. [PMID: 38282514 PMCID: PMC10826392 DOI: 10.1177/17455057241227360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 12/19/2023] [Accepted: 01/04/2024] [Indexed: 01/30/2024]
Abstract
BACKGROUND The human papilloma virus is a global problem that affects sexually active women and men, with cervical cancer being the most serious associated disease. Most cervical cancer cases can be prevented by vaccination against the human papilloma virus early in life. The objective of this study was to assess the knowledge, attitudes, and practices among physicians working in Qatar, regarding the human papilloma virus, infection, and prevention using vaccines. STUDY-DESIGN This was a cross-sectional study using quantitative data collection. METHODOLOGY An online survey targeting physicians working in Qatar was conducted, using a web-based pretested questionnaire. The questionnaire comprised four sections capturing a few demographic details, 33 questions in the Knowledge Section, 12 questions eliciting the attitude, and 14 practice-related questions. Mean knowledge score was calculated and those with a score more than the mean score were considered to have sufficient knowledge. Association between knowledge and attitude/practices/independent variables were looked for using bivariate and multivariate analysis. Logistic regression was used to identify the predictors for recommending human papilloma virus vaccines. RESULTS Of the 557 physicians who participated, 83.7% had sufficient knowledge, but only 69.1% knew that human papilloma virus vaccines were available in Qatar. The majority (89.4%) knew that human papilloma virus infection could be asymptomatic and 96.1% knew at least one symptom; 77% believed the human papilloma virus vaccine would substantially decrease the chances of human papilloma virus infection and related cancers and 46.5% felt physicians were less motivated to promote the human papilloma virus vaccine. The perceived barriers to community acceptance of the human papilloma virus vaccine were lack of awareness regarding the relationship between human papilloma virus and cervical cancer (61.6%), doubts regarding efficacy (32.5%), fear regarding safety (26.9%), concern that the human papilloma virus vaccination may encourage risky sexual behavior (26.8%), and perceived low-risk (23.3%) and cost (24.6%). Only 21.5% commonly discussed sexual health with their clients. More than one-third were not interested in recommending the human papilloma virus vaccine. Bivariate analysis showed nationality, specialization, discussing with patients, and recommending vaccine to be significantly associated with knowledge. Bivariate and regression analysis identified that female gender and physician's religion were significant predictors to recommend the human papilloma virus vaccine. CONCLUSION Most physicians have good knowledge. Less than one-fourth commonly discussed sexual health with their clients. More than one-third were not interested in recommending the human papilloma virus vaccine. This issue might affect the human papilloma virus vaccination program implementation if not well addressed.
Collapse
Affiliation(s)
| | | | - Khalid Elmardi
- HP-CDC, Department of Public Health, Ministry of Public Health, Doha, Qatar
| | - Samina Hasnain
- HP-CDC, Department of Public Health, Ministry of Public Health, Doha, Qatar
| | - Hayat Khogali
- HP-CDC, Department of Public Health, Ministry of Public Health, Doha, Qatar
| | | | | | | | - Mohamed Iheb Bougmiza
- Community Medicine Residency Program Director, Primary Health Care Corporation, Doha, Qatar
| |
Collapse
|
8
|
Obolski U, Stensrud MJ, Nevo D. A call for blinding assessments in dengue vaccine trials. THE LANCET. INFECTIOUS DISEASES 2024; 24:e10. [PMID: 38008100 DOI: 10.1016/s1473-3099(23)00733-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2023] [Revised: 11/14/2023] [Accepted: 11/14/2023] [Indexed: 11/28/2023]
Affiliation(s)
- Uri Obolski
- Department of Epidemiology and Preventive Medicine, School of Public Health, Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel; Department of Environmental Studies, Porter School of the Environment and Earth Sciences, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel.
| | - Mats J Stensrud
- Department of Mathematics, Ecole Polytechnique Fédérale de Lausanne, Lausanne, Switzerland
| | - Daniel Nevo
- Department of Statistics and Operations Research, School of Mathematics, Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
| |
Collapse
|
9
|
Morais S, Wissing MD, Khosrow-Khavar F, Burchell AN, Tellier PP, Coutlée F, Waterboer T, El-Zein M, Franco EL. Serologic response to human papillomavirus genotypes following vaccination: findings from the HITCH cohort study. Infect Dis (Lond) 2024; 56:66-72. [PMID: 37994805 DOI: 10.1080/23744235.2023.2277390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Accepted: 10/26/2023] [Indexed: 11/24/2023] Open
Abstract
BACKGROUND Human papillomavirus (HPV) infection contributes to approximately 5% of the worldwide cancer burden. The three-dose HPV vaccine has demonstrated immunogenicity and efficacy. Humoral responses may be critical for preventing, controlling, and/or eliminating HPV infection. Using data from the HITCH cohort, we analysed humoral immune response to HPV vaccination among women in relation to the phylogenetic relatedness of HPV genotypes. METHODS We included 96 women aged 18-24 years attending college or university in Montreal, Canada. Participants provided blood samples at enrolment and five follow-up visits. Antibody response to bacterially expressed L1 and E6 glutathione S-transferase fusion proteins of multiple Alphapapillomavirus types, and to virus-like particles (VLP-L1) of HPV16 and HPV18 were measured using multiplex serology. We assessed correlations between antibody seroreactivities using Pearson correlations (r). RESULTS At enrolment, 87.7% of participants were unvaccinated, 2.4% had received one, 3.2% two, and 6.7% three doses of HPV vaccine. The corresponding L1 seropositivity to any HPV was 41.2%, 83.3%, 100%, and 97.0%. Between-type correlations for L1 seroreactivities increased with the number of vaccine doses, from one to three. Among the latter, the strongest correlations were observed for HPV58-HPV33 (Pearson correlation [r] = 0.96; α9-species); HPV11-HPV6 (r = 0.96; α10-species); HPV45-HPV18 (r = 0.95; α7-species), and HPV68-HPV59 (r = 0.95; α7-species). CONCLUSIONS Correlations between HPV-specific antibody seroreactivities are affected by phylogenetic relatedness, with anti-L1 correlations becoming stronger with the number of vaccine doses received.
Collapse
Affiliation(s)
- Samantha Morais
- Division of Cancer Epidemiology, McGill University, Montreal, Canada
| | - Michel D Wissing
- Division of Cancer Epidemiology, McGill University, Montreal, Canada
| | | | - Ann N Burchell
- Department of Family and Community Medicine and MAP Centre for Urban Health Solutions, Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, Toronto, Canada
| | | | - François Coutlée
- Division of Cancer Epidemiology, McGill University, Montreal, Canada
- Laboratoire de Virologie Moléculaire, Centre de Recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM), et Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Canada
| | - Tim Waterboer
- Infections and Cancer Epidemiology Division, German Cancer Research Center, Heidelberg, Germany
| | - Mariam El-Zein
- Division of Cancer Epidemiology, McGill University, Montreal, Canada
| | - Eduardo L Franco
- Division of Cancer Epidemiology, McGill University, Montreal, Canada
| |
Collapse
|
10
|
Kassymbekova F, Zhetpisbayeva I, Tcoy E, Dyussenov R, Davletov K, Rommel A, Glushkova N. Exploring HPV vaccine knowledge, attitudes, barriers and information sources among parents, health professionals and teachers in Kazakhstan: a mixed-methods study protocol. BMJ Open 2023; 13:e074097. [PMID: 37739465 PMCID: PMC10533667 DOI: 10.1136/bmjopen-2023-074097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 09/24/2023] Open
Abstract
INTRODUCTION Human papillomavirus (HPV) is a prevalent sexually transmitted infection linked to certain types of malignant neoplasms, notably cervical cancer (CC). In Kazakhstan, a high prevalence of high oncogenic HPV types (HR-HPV) has been observed, and CC ranks as the second most common malignancy among women with a crude incidence rate of 18.3 cases per 100 000 women. The HPV vaccine, developed as the primary prevention measure against HPV infection, including the most prevalent HR-HPV, received approval from the WHO in 2009. In 2014, Kazakhstan initiated HPV vaccination as a pilot project in four sub-national regions; however, it was later in 2017 discontinued due to widespread parental refusal influenced by negative media reports. This study aims to examine knowledge, attitudes, information sources, barriers to HPV vaccination and factors associated with HPV vaccination hesitancy among different target groups in Kazakhstan prior to the HPV vaccine re-launch announced by the Ministry of Health. METHODS AND ANALYSIS This mixed-method-designed research comprises quantitative and qualitative components. Data on HPV awareness, attitudes towards HPV vaccination and sources of information will be collected through an online survey administered by parents and legal guardians, health professionals, and schoolteachers in the Republic of Kazakhstan between January 2023 and January 2024. Additionally, qualitative data on Kazakhstani parental beliefs and attitudes toward HPV vaccination will be collected through online focus group discussions. ETHICS AND DISSEMINATION OF RESULTS The study has been approved by the local ethics committee at the Kazakhstan Medical University "Higher School of Public Health" (KMU "KSPH") (No. 138 of 31.05.2021). The results will be reported in publications, at conferences among researchers and healthcare and school education professionals in Kazakhstan, and internationally.
Collapse
Affiliation(s)
- Fatima Kassymbekova
- Department of Public Health and Social Sciences, Kazakhstan Medical University "KSPH", Almaty, Kazakhstan
| | - Indira Zhetpisbayeva
- Department of Public Health and Social Sciences, Kazakhstan Medical University "KSPH", Almaty, Kazakhstan
| | - Evgeniya Tcoy
- Department of Obstetrics and Gynaecology, Kazakh-Russian Medical University, Almaty, Kazakhstan
| | - Rassul Dyussenov
- Department of Public Health and Social Sciences, Kazakhstan Medical University "KSPH", Almaty, Kazakhstan
| | - Kairat Davletov
- Health Research Center, Asfendiyarov Kazakh National Medical University, Almaty, Kazakhstan
| | - Alexander Rommel
- Epidemiology and Health Monotoring, Robert Koch Institute, Berlin, Germany
| | - Natalya Glushkova
- Department of Epidemiology, Biostatistics and Evidence Based Medicine, Al-Farabi Kazakh National University, Almaty, Kazakhstan
| |
Collapse
|
11
|
Chan DN, Li C, Law BM, Choi K, Lee PP, So WK. Factors affecting HPV vaccine uptake among ethnic minority adolescent girls: A systematic review and meta-analysis. Asia Pac J Oncol Nurs 2023; 10:100279. [PMID: 37661962 PMCID: PMC10471936 DOI: 10.1016/j.apjon.2023.100279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Accepted: 07/26/2023] [Indexed: 09/05/2023] Open
Abstract
Objective Human papillomavirus (HPV) vaccination rates remain low among adolescent girls across ethnic minority groups that experience high incidences of HPV-related cervical cancer with poor outcomes. This systematic review aimed to synthesize the available evidence on the factors affecting HPV vaccination among ethnic minority adolescent girls. Methods Six databases (PubMed, OVID MEDLINE, EMBASE, CINAHL, PsycINFO, and Scopus) were searched from inception to October 17, 2022. Guided by the conceptual model of vaccine hesitancy, the factors affecting HPV vaccine uptake were descriptively synthesized and analyzed using meta-analyses. Results This review included 14 studies. The pooled uptake rate of at least one dose of HPV vaccine among ethnic minority adolescent girls was only 38% (95% confidence interval = 0.22, 0.39). At individual level, age of adolescent girls, knowledge of HPV, perceived importance of HPV vaccination, and perceived risk of HPV infection promoted the vaccine uptake. Beliefs in conspiracy theories and lack of trust in the government and HPV vaccine discouraged the utilization. At social and policy levels, health professionals' recommendations, subjective norms, sexuality-related communication, and vaccine policies such as insurance coverage facilitated HPV vaccination. The religious and moral convictions regarding abstinence from sex until marriage negatively influenced the vaccine acceptance. Conclusions HPV vaccination among ethnic minority adolescent girls was influenced by multi-level factors that highlighted a combined effort, including culturally sensitive health education programmes, sexuality-related communication skills training, collaboration with religious organizations, debunking conspiracy theories in HPV vaccine, and promoting school-based vaccination programs, to increase the coverage. Systematic review registration PROSPERO, CRD42022366805.
Collapse
Affiliation(s)
- Dorothy N.S. Chan
- The Nethersole School of Nursing, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Caixia Li
- The Nethersole School of Nursing, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Bernard M.H. Law
- The Nethersole School of Nursing, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - K.C. Choi
- The Nethersole School of Nursing, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Pinky P.K. Lee
- The Nethersole School of Nursing, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Winnie K.W. So
- The Nethersole School of Nursing, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong SAR, China
| |
Collapse
|
12
|
Ferrando-Díez A, Pavón MA, Cirauqui B, Alemany L, Mesía R. How to prevent human papillomavirus-related oropharyngeal cancer? Curr Opin Oncol 2023; 35:145-150. [PMID: 36966500 DOI: 10.1097/cco.0000000000000937] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/27/2023]
Abstract
PURPOSE OF REVIEW Human papillomavirus (HPV) is responsible of the increasing incidence rates of oropharyngeal squamous cell carcinoma (OPSCC) in high-income countries. This significant epidemiological change requires several and diverse prevention strategies. RECENT FINDINGS The cervical cancer prevention model is the paradigm of HPV-related cancer, and its success provides encouragement for the development of similar methods to prevent HPV-related OPSCC. However, there are some limitations that hinder its application in this disease. Here, we review the primary, secondary and tertiary prevention of HPV-related OPSCC and discuss some directions for future research. SUMMARY The development of new and targeted strategies to prevent HPV-related OPSCC is needed since they could definitely have a direct impact on the reduction of morbidity and mortality of this disease.
Collapse
Affiliation(s)
- Angelica Ferrando-Díez
- Medical Oncology Department, Catalan Institute of Oncology-Badalona (ICO), Applied Research Group in Oncology (B-ARGO), IGTP, 08916 Badalona
| | - Miguel Angel Pavón
- Cancer Epidemiology Research Program, Catalan Institute of Oncology (ICO)-IDIBELL, L'Hospitalet de Llobregat, 08908 Barcelona
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), 28029 Madrid, Spain
| | - Beatriz Cirauqui
- Medical Oncology Department, Catalan Institute of Oncology-Badalona (ICO), Applied Research Group in Oncology (B-ARGO), IGTP, 08916 Badalona
| | - Laia Alemany
- Cancer Epidemiology Research Program, Catalan Institute of Oncology (ICO)-IDIBELL, L'Hospitalet de Llobregat, 08908 Barcelona
- Centro de Investigación Biomédica en Red de Epidemiología y Salud Pública (CIBERESP), 28029 Madrid, Spain
| | - Ricard Mesía
- Medical Oncology Department, Catalan Institute of Oncology-Badalona (ICO), Applied Research Group in Oncology (B-ARGO), IGTP, 08916 Badalona
| |
Collapse
|
13
|
Villa LL, Richtmann R. HPV vaccination programs in LMIC: is it time to optimize schedules and recommendations? J Pediatr (Rio J) 2023; 99 Suppl 1:S57-S61. [PMID: 36638833 PMCID: PMC10066421 DOI: 10.1016/j.jped.2022.11.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Accepted: 11/09/2022] [Indexed: 01/12/2023] Open
Abstract
OBJECTIVES Prophylactic HPV vaccines are a fundamental tool to reduce infections and tumors caused by the most prevalent types of these viruses, as this review points out. Several countries have adopted immunization programs that recommend vaccination against HPV for girls and adolescents between 9 and 14 years of age and, in some of them, also for boys. The programs also contemplate the immunization of adults, particularly in the case of individuals with different immunodeficiencies. SOURCES OF DATA The available vaccines are recommended for the prevention of tumors of the uterine cervix, vulva, vagina, penis, and anal canal. Moreover, two of the vaccines prevent the occurrence of genital warts, having been recently indicated for the prevention of oropharyngeal cancer. DATA SYNTHESIS Based on the evidence that antibody responses in girls were non-inferior after two doses when compared to three doses, several countries have decided to reduce the vaccination schedule for girls and boys up to 14 years of age from three to two doses, with an interval of six months between them. Recently, knowledge has been accumulating about the immunogenicity, duration of protection, and efficacy of a single-dose HPV vaccine regimen in girls and young women. CONCLUSION Single-dose HPV vaccination could substantially reduce the incidence of pre-cancer and cervical cancer attributable to HPV, with reduced costs for vaccine delivery and simplified implementation, allowing more countries to introduce HPV vaccination or increase the adherence of the target population.
Collapse
Affiliation(s)
- Luisa Lina Villa
- Faculdade de Medicina da Universidade de São Paulo, São Paulo, SP, Brazil; Instituto do Câncer do Estado de São Paulo, São Paulo, SP, Brazil.
| | - Rosana Richtmann
- Instituto de Infectologia Emilio Ribas, São Paulo, SP, Brazil; Grupo Santa Joana, São Paulo, SP, Brazil
| |
Collapse
|
14
|
Roy DN, Huda MN, Azam MS. Factors influencing COVID-19 vaccine acceptance and hesitancy among rural community in Bangladesh: A cross-sectional survey based study. Hum Vaccin Immunother 2022; 18:2064685. [PMID: 35580319 PMCID: PMC9897644 DOI: 10.1080/21645515.2022.2064685] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Although more than one hundred million beneficiaries were administered COVID-19 vaccine until 20th February, 2022 in Bangladesh; however, proportionally a low turnout has been recorded in rural places and a substantial gap exist among the people living in rural and urban areas concerning the ratio of receiving vaccine. This study aims to investigate COVID-19 vaccine acceptance intention and to identify the potential factors influencing vaccine acceptance and hesitancy among the rural community in Bangladesh. A bilingual, self-administered anonymous questionnaire was developed, and data were collected between 10th June 2021 and 14th August 2021 through face-to-face interview. 655 rural people participated in this cross-sectional study, and sampling was done randomly. Descriptive statistics and binary logistic regressions were used to explore and rationalize study objectives. Out of 655 rural participants, 552 (84.3%, 95% CI 81.2─86.8) responded to accept COVID-19 vaccine; however, minor fractions (n = 5, n% = 0.8, 95% CI 0.12-1.4) of rural community had willingness to pay (WTP) for a COVID-19 vaccine. The result of binary regression showed that "safety," "side effects," "effectiveness," and "trust" had highly significant (p <.01) and positive correlation with vaccine acceptance intention. "Rumor" had moderately significant (p <.05) and negative association while "gender" had insignificant correlation with vaccine acceptance intention. Easy and constant access to evidence-based and trustworthy information on vaccination consequences is imperative for resource-less remote people. Health communication regarding safety, side effect, and effectiveness of vaccines were identified as the most important predictor to convert vaccines to vaccinations and for ensuring mass immunization against COVID-19 in Bangladesh.
Collapse
Affiliation(s)
- Debendra Nath Roy
- Department of Pharmacy, Jashore University of Science and Technology, Jashore, Bangladesh,Institute of Education and Research, University of Rajshahi, Rajshahi, Bangladesh
| | | | - Md. Shah Azam
- Department of Marketing, University of Rajshahi, Rajshahi, Bangladesh,Office of the Vice Chancellor, Rabindra University, Bangladesh,CONTACT Md. Shah Azam Department of Marketing, University of Rajshahi, Dhaka Road, Rajshahi 6205, Bangladesh
| |
Collapse
|
15
|
Waser M, Heiss R, Borena W. Factors affecting children's HPV vaccination in Austria: Evidence from a parent survey. Hum Vaccin Immunother 2022; 18:2126251. [PMID: 36251011 DOI: 10.1080/21645515.2022.2126251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Human papillomavirus (HPV) is a sexually transmitted infection that causes cervical cancer, head and neck cancer, other urogenital cancers, and genital warts. In Austria, where HPV vaccination is free for children, the vaccination rate nevertheless remains insufficient for herd immunity against HPV. Using a cross-sectional survey of parents (N = 334) in the state of Tyrol, Austria, we examined parents' reasons for rejecting children's HPV vaccination and key predictors of vaccination intention for their children, including knowledge about HPV, attitude toward vaccination, sources of information about the HPV vaccine, socioeconomic factors, and HPV vaccination intention. Data analyzed using descriptive statistics and logistic regression modeling revealed an overall 81.9% acceptance rate of HPV vaccination. The most common reasons for vaccine hesitancy were a fear of side effects, a perceived lack of information, and the perception that children are too young to be vaccinated. A high level of knowledge about HPV was significantly associated with vaccine acceptance for female but not male children. Negative attitude toward vaccination was significantly related to lower vaccine acceptance, and parents who reported informing themselves about HPV vaccination from online sources were less likely to accept vaccination. Such results call for more educational measures to reduce misinformation about HPV vaccination and thereby reduce the fear of its side effects and promote early vaccination. More information is also needed to improve parents' attitude toward and their knowledge about vaccination, the dissemination of which should focus on the benefits of vaccines for children of both sexes.
Collapse
Affiliation(s)
- Madeleine Waser
- Center for Social & Health Innovation MCI Management Center Innsbruck, Innsbruck, Austria
| | - Raffael Heiss
- Center for Social & Health Innovation MCI Management Center Innsbruck, Innsbruck, Austria
| | - Wegene Borena
- Institute of Virology, Innsbruck Medical University, Innsbruck, Austria
| |
Collapse
|
16
|
Akhatova A, Azizan A, Atageldiyeva K, Ashimkhanova A, Marat A, Iztleuov Y, Suleimenova A, Shamkeeva S, Aimagambetova G. Prophylactic Human Papillomavirus Vaccination: From the Origin to the Current State. Vaccines (Basel) 2022; 10:1912. [PMID: 36423008 PMCID: PMC9696339 DOI: 10.3390/vaccines10111912] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/09/2022] [Accepted: 11/09/2022] [Indexed: 07/30/2023] Open
Abstract
Immunization is the most successful method in preventing and controlling infectious diseases, which has helped saving millions of lives worldwide. The discovery of the human papillomavirus (HPV) infection being associated with a variety of benign conditions and cancers has driven the development of prophylactic HPV vaccines. Currently, four HPV vaccines are available on the pharmaceutical market: Cervarix, Gardasil, Gardasil-9, and the recently developed Cecolin. Multiple studies have proven the HPV vaccines' safety and efficacy in preventing HPV-related diseases. Since 2006, when the first HPV vaccine was approved, more than 100 World Health Organization member countries reported the implementation of HPV immunization. However, HPV vaccination dread, concerns about its safety, and associated adverse outcomes have a significant impact on the HPV vaccine implementation campaigns all over the world. Many developed countries have successfully implemented HPV immunization and achieved tremendous progress in preventing HPV-related conditions. However, there are still many countries worldwide which have not created, or have not yet implemented, HPV vaccination campaigns, or have failed due to deficient realization plans associated with establishing successful HPV vaccination programs. Lack of proper HPV information campaigns, negative media reflection, and numerous myths and fake information have led to HPV vaccine rejection in many states. Thus, context-specific health educational interventions on HPV vaccination safety, effectiveness, and benefits are important to increase the vaccines' acceptance for efficacious prevention of HPV-associated conditions.
Collapse
Affiliation(s)
- Ayazhan Akhatova
- School of Medicine, Nazarbayev University, Astana 010000, Kazakhstan
| | - Azliyati Azizan
- Department of Basic Sciences, College of Osteopathic Medicine, Touro University, Henderson, NV 89014, USA
| | - Kuralay Atageldiyeva
- Department of Medicine, School of Medicine, Nazarbayev University, Astana 010000, Kazakhstan
- Clinical Academic Department of Internal Medicine, CF University Medical Center, Astana 10000, Kazakhstan
| | - Aiymkul Ashimkhanova
- Department of Medicine, School of Medicine, Nazarbayev University, Astana 010000, Kazakhstan
| | - Aizada Marat
- Department of Obstetrics and Gynecology #1, NJSC “Astana Medical University”, Astana 010000, Kazakhstan
| | - Yerbolat Iztleuov
- Medical Center, Marat Ospanov West-Kazakhstan Medical University, Aktobe 030000, Kazakhstan
| | - Assem Suleimenova
- Kazakh Institute of Oncology and Radiology, Almaty 050000, Kazakhstan
| | - Saikal Shamkeeva
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnostics, Leipzig University Hospital, 04103 Leipzig, Germany
| | - Gulzhanat Aimagambetova
- Department of Biomedical Sciences, School of Medicine, Nazarbayev University, Astana 010000, Kazakhstan
| |
Collapse
|
17
|
Charde SH, Warbhe RA. Human Papillomavirus Prevention by Vaccination: A Review Article. Cureus 2022; 14:e30037. [DOI: 10.7759/cureus.30037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Accepted: 10/07/2022] [Indexed: 11/07/2022] Open
|
18
|
Dundar Y, Eldem I, Schwartz C, Pomeroy L, Cordero J, Arslan O, Levent F. Screening Awareness of HPV-Related Oropharyngeal Cancers and Attitudes and Concerns towards HPV Vaccination Among Parents : HPV and Oropharyngeal Cancer. JOURNAL OF CANCER EDUCATION : THE OFFICIAL JOURNAL OF THE AMERICAN ASSOCIATION FOR CANCER EDUCATION 2022; 37:1152-1160. [PMID: 33411252 DOI: 10.1007/s13187-020-01932-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 11/24/2020] [Indexed: 06/12/2023]
Abstract
Baseline population opinions on human papillomavirus (HPV) and HPV vaccination must be understood before physicians can address knowledge gaps in that population and encourage timely vaccination. To determine the opinions of parents of children age 9 to 18 on HPV-related oropharyngeal cancers (OPC); the associations with education level, socioeconomic status, and having a family member/friend with OPC; and the main concerns against having a vaccination., An anonymous survey was created and administered. Parents were asked to complete the survey if they met the inclusion criteria. After the survey, results were tabulated, and the answers for each question were analyzed. The target population was surveyed in the clinic. The target population was parents with children between 9 and 18 years old: the background knowledge and awareness of HPV-related OPC and associations with education level, socioeconomic status, having a family member/friend with OPC, and concerns about vaccination. Our study results showed that the age of parents, education level, marital status, personal vaccination status, and gender of the child are significant factors for background knowledge about HPV-related diseases. Similarly, the education level, the gender of the child, and personal vaccination status are significant factors towards attitudes against having children vaccinated. There is a strong correlation between background knowledge and attitudes. The main issues about vaccination are concerns about effectiveness and side effects, concerns about safe sex experiences, and the cost of vaccination. This is the first study designed to provide information on parents' knowledge of HPV-related cancers, prevalence of HPV vaccination, and attitudes and concerns about HPV vaccination in the USA. The lack of awareness of HPV-related cancers is a significant factor in attitudes against HPV vaccination.
Collapse
Affiliation(s)
- Yusuf Dundar
- Department of Otolaryngology-Head and Neck Surgery, Texas Tech University Health Sciences Center, 3601 4th Street, STOP 8315, Lubbock, TX, 79430-8315, USA.
| | - Irem Eldem
- Department of Pediatrics, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| | - Cynthia Schwartz
- Department of Otolaryngology-Head and Neck Surgery, Texas Tech University Health Sciences Center, 3601 4th Street, STOP 8315, Lubbock, TX, 79430-8315, USA
| | - Lisa Pomeroy
- Department of Pediatrics, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| | - Joehassin Cordero
- Department of Otolaryngology-Head and Neck Surgery, Texas Tech University Health Sciences Center, 3601 4th Street, STOP 8315, Lubbock, TX, 79430-8315, USA
| | - Okan Arslan
- Department Educational Psychology and Leadership, Texas Tech University, Lubbock, TX, 79430, USA
| | - Fatma Levent
- Department of Pediatrics, Texas Tech University Health Sciences Center, Lubbock, TX, 79430, USA
| |
Collapse
|
19
|
Kolek CO, Opanga SA, Okalebo F, Birichi A, Kurdi A, Godman B, Meyer JC. Impact of Parental Knowledge and Beliefs on HPV Vaccine Hesitancy in Kenya-Findings and Implications. Vaccines (Basel) 2022; 10:vaccines10081185. [PMID: 35893833 PMCID: PMC9332201 DOI: 10.3390/vaccines10081185] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 07/18/2022] [Accepted: 07/19/2022] [Indexed: 02/06/2023] Open
Abstract
Cervical cancer can be prevented by human papillomavirus (HPV) vaccination. However, parents can have concerns about vaccinating their daughters. Consequently, there is a need to identify prevalence and risk factors for HPV vaccine hesitancy among parents in Kenya. A descriptive cross-sectional study was conducted among parents with children aged 9−14 years attending a leading referral hospital in Kenya. Data on sociodemographic traits, HPV knowledge, beliefs and vaccine hesitancy were collected. Out of 195 participants, 183 (93.5%) were aged >30 years. Thirty-four (46.4%) of males and 39 (35.1%) of females did not know that the vaccine is given to prevent HPV infection. Encouragingly, levels of vaccine acceptance were high (90%) although one-third (37.9%) had a negative perception about the effectiveness of the vaccine, with vaccine hesitancy attributed to safety concerns (76%) and feelings that the child was too young (48%). Positive beliefs and knowledge of the vaccine were positively associated with parental willingness to vaccinate their children. Low levels of parenteral education and a younger age among mothers were negatively associated with willingness to vaccinate. Most parents (59%) would consult their daughters before vaccination, and 77% (n = 150) recommended early sex education. Despite low knowledge levels, there was high parental willingness to have their children vaccinated.
Collapse
Affiliation(s)
| | - Sylvia A. Opanga
- Department of Pharmacy, University of Nairobi, Nairobi 00202, Kenya;
- Correspondence: (S.A.O.); or (B.G.)
| | - Faith Okalebo
- Department of Pharmacy, University of Nairobi, Nairobi 00202, Kenya;
| | - Alfred Birichi
- Directorate of Pharmaceutical Services, Kenyatta National Hospital, Nairobi 00202, Kenya;
| | - Amanj Kurdi
- Department of Pharmacoepidemiology, Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK;
- Department of Pharmacology, College of Pharmacy, Hawler Medical University, Erbil 44001, Iraq
- Department of Public Health Pharmacy and Management, Sefako Makgatho Health Sciences University, Ga-Rankuwa, Pretoria 0208, South Africa;
| | - Brian Godman
- Department of Pharmacoepidemiology, Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK;
- Department of Public Health Pharmacy and Management, Sefako Makgatho Health Sciences University, Ga-Rankuwa, Pretoria 0208, South Africa;
- Centre of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman 13306, United Arab Emirates
- Correspondence: (S.A.O.); or (B.G.)
| | - Johanna C. Meyer
- Department of Public Health Pharmacy and Management, Sefako Makgatho Health Sciences University, Ga-Rankuwa, Pretoria 0208, South Africa;
| |
Collapse
|
20
|
Ryan GW, Perry SS, Scherer A, Charlton ME, Ashida S, Gilbert PA, Askelson N. Factors contributing to missed opportunities for human papillomavirus vaccination among adolescents, ages 11 to 13, in Iowa. Vaccine X 2022; 11:100192. [PMID: 35864862 PMCID: PMC9294328 DOI: 10.1016/j.jvacx.2022.100192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2022] [Revised: 06/16/2022] [Accepted: 06/28/2022] [Indexed: 11/18/2022] Open
Abstract
Introduction Rates of human papillomavirus (HPV) vaccination remain low and missed opportunities for HPV vaccination are widespread. Researchers have identified factors related to HPV vaccination, but less is known about missed opportunities. Methods We used medical claims data from a large Midwestern insurance provider to explore relationships between adolescent and provider characteristics and missed opportunities for HPV vaccination. We stratified models by initiation status with adolescents who had received one or more HPV vaccinations in one group (n = 6,123) and adolescents with no record of an HPV vaccination in the other (n = 8,107). Results There were significant differences in comparisons of all variables between initiators and non-initiators. Notably, non-initiators had lower rates of vaccination for HPV and other adolescent vaccinations, and fewer well-child visits. For all adolescents, birth year, having other recommended vaccines, and number of well-child visits were significantly associated with missed opportunities. Additionally, among initiators, pediatrician as a primary care provider and being in a rural area were significantly associated. Discussion Overall, adolescents with greater healthcare utilization had more missed opportunities, indicating that, despite increased numbers of visits, providers are not taking advantage of these opportunities to vaccinate. Future research should prioritize developing a deeper understanding of why these missed opportunities are occurring and implementing new and existing strategies to prevent them. Reducing missed opportunities will help to prevent future HPV-related cancers and the significant morbidity and mortality that they can cause.
Collapse
Affiliation(s)
- Grace W. Ryan
- Department of Community and Behavioral Health, College of Public Health, University of Iowa, 145 N. Riverside Drive, Iowa City IA, 52242, United States
- Corresponding author at: 368 Plantation St., Worcester, MA 01605, United States.
| | - Sarah S. Perry
- Department of Biostatistics, College of Public Health, University of Iowa, 145 N. Riverside Drive, Iowa City IA, 52242, United States
| | - Aaron Scherer
- Carver College of Medicine, University of Iowa, 375 Newton Road, Iowa City IA, 52242, United States
| | - Mary E. Charlton
- Department of Epidemiology, College of Public Health, University of Iowa, 145 N. Riverside Drive, Iowa City IA, 52242, United States
| | - Sato Ashida
- Department of Community and Behavioral Health, College of Public Health, University of Iowa, 145 N. Riverside Drive, Iowa City IA, 52242, United States
| | - Paul A. Gilbert
- Department of Community and Behavioral Health, College of Public Health, University of Iowa, 145 N. Riverside Drive, Iowa City IA, 52242, United States
| | - Natoshia Askelson
- Department of Community and Behavioral Health, College of Public Health, University of Iowa, 145 N. Riverside Drive, Iowa City IA, 52242, United States
| |
Collapse
|
21
|
Parent Attitudes regarding Orthodontists’ Role as Potential Administrators of Human Papilloma Virus (HPV) Vaccines. Int J Dent 2022; 2022:6541532. [PMID: 35706457 PMCID: PMC9192217 DOI: 10.1155/2022/6541532] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 05/03/2022] [Accepted: 05/12/2022] [Indexed: 11/29/2022] Open
Abstract
Objective To assess parent attitudes regarding orthodontists' role as potential administrators of human papilloma virus (HPV) vaccines. Materials and Methods 275 parents of adolescents, aged 11–17, who attended the orthodontic clinic at an American university for orthodontic adjustment visits and met inclusion criteria were given information about HPV and HPV vaccines. A paper questionnaire was administered to assess comfort level with orthodontists as HPV vaccinators. Demographic and other potential explanatory characteristics were collected. Descriptive, bivariate, and multivariate ordinal logistic regression analyses were performed with SPSS statistical software v25. Results The majority of participants were between 31 and 40 years old, with 79.6% identifying as female. 54.3% of the subjects' children identified as female. Although 71.3% of participants identified as Hispanic, 55.3% of the total participants chose to respond to the questionnaire in Spanish. 66.7% of the participants reported education level as high school degree or less. Overall, 52.4% of parents responded that they would be comfortable with orthodontists administering HPV vaccines to their children. Bivariate analysis suggested a significant association (p < 0.05) of parents taking the survey in Spanish and parents' educational attainment with HPV vaccine administration comfort level. Multivariate ordinal logistic regression indicates that parents taking survey in Spanish (adjusted OR: 2.42, 95% CI: 1.24–4.72; p < .01) and parents of male children (adjusted OR: 1.66, 95% CI: 1.01–2.73; p < 047) were comfortable with orthodontists administering the HPV vaccine. Conclusions The language of the survey influenced parents' comfort level with orthodontists as HPV vaccinators, with Spanish having a positive correlation to comfort level. Parents of male children were more comfortable with orthodontists as HPV vaccinator.
Collapse
|
22
|
HPV Vaccination: An Underused Strategy for the Prevention of Cancer. Curr Oncol 2022; 29:3780-3792. [PMID: 35621693 PMCID: PMC9140027 DOI: 10.3390/curroncol29050303] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 04/28/2022] [Accepted: 05/13/2022] [Indexed: 01/08/2023] Open
Abstract
Human papillomavirus (HPV) vaccination prevents cervical, head and neck, and anogenital cancers. However, global HPV vaccine coverage falls short of global targets and has seen unexpected and dramatic declines in some countries. This paper synthesizes the impact of HPV on the global burden of cancer and the potential benefit of HPV vaccination. Approximately 5% of the world’s cancers are specifically attributed to HPV. While the greatest global burden of HPV is cervical cancers in low- and middle-income countries, HPV-associated head and neck cancers are increasing in high-income countries and have surpassed cervical cancer as the primary HPV-associated cancer in some countries. Therefore, it is also critical to improve gender-neutral HPV vaccination. Understanding the modifiable drivers of vaccine acceptance and uptake is important for increasing HPV vaccination. The Behavioural and Social Drivers of Vaccination framework is broadly applied to identify key factors associated with HPV vaccination including domains concerning practical issues, motivation, social processes, and thinking and feeling. Among the behavioural strategies available to reduce the incidence and mortality of cancer, increasing HPV vaccination stands out as having unrealized potential to prevent disease, financial cost, and psychological distress. An understanding of the shifting burden of HPV and the factors associated with vaccination can be leveraged to regularly measure these factors, develop interventions to promote vaccine uptake, and improve global HPV vaccine coverage. Future research in diverse contexts is necessary to investigate the barriers and facilitators of global HPV vaccination.
Collapse
|
23
|
Mehta A, Markman B, Rodriguez-Cintron W. Don’t jump down my throat: gender gap in HPV vaccinations risk long term cancer threats. Expert Rev Vaccines 2022; 21:1045-1053. [DOI: 10.1080/14760584.2022.2075850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Armaan Mehta
- George Washington University School of Public Health and Health Services, Virginia, United States
| | - Bethany Markman
- George Washington University School of Public Health and Health Services, Virginia, United States
| | | |
Collapse
|
24
|
Milondzo T, Meyer JC, Dochez C, Burnett RJ. Human Papillomavirus Vaccine Hesitancy Highly Evident among Caregivers of Girls Attending South African Private Schools. Vaccines (Basel) 2022; 10:vaccines10040503. [PMID: 35455252 PMCID: PMC9033046 DOI: 10.3390/vaccines10040503] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/20/2022] [Accepted: 03/22/2022] [Indexed: 02/05/2023] Open
Abstract
The viral spread of social media misinformation and disinformation regarding human papillomavirus (HPV) vaccination safety has resulted in widespread vaccine hesitancy and suboptimal HPV vaccination uptake. We previously reported that only 19.4% of age-eligible private school girls in South Africa in 2018 had received ≥1 HPV vaccine dose. Here, we report on reasons given by caregivers for why their daughters were unvaccinated. An online survey targeting caregivers of girls in grades 4–7 attending South African private schools was conducted. Caregivers of unvaccinated girls provided the most important reason for their daughter not being vaccinated by either selecting from a list of coded reasons or providing a free text reason. Free text reasons were analysed, coded and added to the list of coded reasons, which were categorised according to broad themes. Frequency distributions of reasons and categories were calculated. Most reasons were related to vaccine hesitancy (61.4%), followed by lack of access to the vaccine (21.3%) and lack of information (15.7%). HPV vaccination coverage among age-eligible girls can be improved by including private-sector schools in the South African HPV vaccination programme, training healthcare providers to advocate for HPV vaccination and extending HPV vaccination advocacy campaigns to include private-sector educators.
Collapse
Affiliation(s)
- Tracy Milondzo
- Department of Public Health, University of Limpopo, Polokwane 0727, South Africa;
| | - Johanna C. Meyer
- Division of Public Health Pharmacy and Management, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa;
- South African Vaccination and Immunisation Centre, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
| | - Carine Dochez
- Network for Education and Support in Immunisation, Department of Family Medicine and Population Health, University of Antwerp, 2000 Antwerp, Belgium;
| | - Rosemary J. Burnett
- South African Vaccination and Immunisation Centre, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
- Department of Virology, Sefako Makgatho Health Sciences University, Pretoria 0204, South Africa
- Correspondence:
| |
Collapse
|
25
|
Zhou Q, Gong Y, Qiu X, Sui L, Zhang H, Wang Y, Lin L, Diao W, Li Y. Visual appearance of the uterine cervix differs on the basis of HPV type status in high-grade squamous intraepithelial lesion: the results of a reliable method. BMC Womens Health 2022; 22:24. [PMID: 35094702 PMCID: PMC8801095 DOI: 10.1186/s12905-021-01565-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 12/08/2021] [Indexed: 12/24/2022] Open
Abstract
Background This study aimed to evaluate the differences in cervical appearance among different human papillomavirus (HPV) genotypes in patients with high-grade squamous intraepithelial lesions (HSILs). Methods
A total of 239 histopathological HSIL patients were included and divided into eight groups on the basis of HPV genotype in this prospective study. We present a reliable imaging method that provides reproducible, sensitive and unbiased assessments of cervical appearance characteristics. Colorimetric and morphometric data of colposcopic patterns after the application of acetic acid and iodine were acquired using ImageJ software and the surrounding normal regions were used as controls. Results The differences in red, green, blue and mean greyscale values in acetowhite epithelium obtained from ImageJ were not significant between the HPV16 and HPV18 groups (P < 0.05). The differences in red, green, and mean greyscale values in iodine staining were significant between the HPV18 and the other groups (P < 0.05). The frequency of the occurrence of the coarse mosaic patterns was significantly different among groups (P < 0.05), reducing in sequence were the HPV16, HPV-negative, HPV18, HPV31/33 and HPV52/58 groups. For the lesion area of HSILs, the HPV-negative group was the largest. The sensitivity of colposcopic impression varied among HPV genotypes (P < 0.01), being lowest in the HPV52 group. Conclusions Although being nonspecific, iodine negativity should be concerned in HPV18-positive lesions which is closely related to glandular epithelium. Vascular patterns in HPV52/58-positive HSIL are quite occult and tend to be missed by colposcopists. HPV-negative lesions are prone to be large and present typical vascular patterns despite being rare.
Collapse
Affiliation(s)
- Qi Zhou
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fangxie Road, Shanghai, 200011, China
| | - Yingxin Gong
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fangxie Road, Shanghai, 200011, China
| | - Xiangmei Qiu
- The First Affiliated Hospital of Zunyi Medical College, Guizhou, 563000, China
| | - Long Sui
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fangxie Road, Shanghai, 200011, China
| | - Hongwei Zhang
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fangxie Road, Shanghai, 200011, China
| | - Yan Wang
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fangxie Road, Shanghai, 200011, China
| | - Lin Lin
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fangxie Road, Shanghai, 200011, China
| | - Wenjing Diao
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fangxie Road, Shanghai, 200011, China
| | - Yanyun Li
- Obstetrics and Gynecology Hospital of Fudan University, 419 Fangxie Road, Shanghai, 200011, China.
| |
Collapse
|
26
|
Vaccine Strategies for Human Papillomavirus-Associated Head and Neck Cancers. Cancers (Basel) 2021; 14:cancers14010033. [PMID: 35008197 PMCID: PMC8750601 DOI: 10.3390/cancers14010033] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Revised: 12/15/2021] [Accepted: 12/20/2021] [Indexed: 12/25/2022] Open
Abstract
Simple Summary Human papillomavirus (HPV) is recognized as a significant risk factor for head and neck cancers worldwide, and it is the most common cause of oropharyngeal cancers in the United States. Here, we review the incidence and pathogenesis of HPV-related cancers, the development and approval of HPV prophylactic vaccines, and the use and effectiveness of HPV vaccines around the world. Furthermore, we discuss advances in the development of HPV therapeutic vaccines as well as its associated challenges. Abstract The rising incidence of oropharyngeal squamous cell cancers (OPSCC) in the United States is largely attributed to HPV. Prophylactic HPV vaccines have demonstrated effectiveness against oral infection of HPV 16 and HPV 18. We review the global epidemiology and biology of HPV-related cancers as well as the development of HPV vaccines and their use worldwide. We also review the various strategies and challenges in development of therapeutic HPV vaccines.
Collapse
|
27
|
Estimation of mid-and long-term benefits and hypothetical risk of Guillain-Barre syndrome after human papillomavirus vaccination among boys in France: A simulation study. Vaccine 2021; 40:359-363. [PMID: 34865876 DOI: 10.1016/j.vaccine.2021.11.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 11/15/2021] [Accepted: 11/16/2021] [Indexed: 11/21/2022]
Abstract
BACKGROUND The burden of human papillomavirus (HPV) infection can be substantially reduced through vaccination of girls, and gender-neutral policies are being adopted in many countries to accelerate disease control among women and expand direct benefits to men. Clinical direct benefit of boys HPV vaccination has been established for ano-genital warts and anal cancer. HPV vaccines are considered safe, but an association with Guillain-Barre syndrome has been found in French reimbursement and hospital discharge data. METHODS We conducted a Monte-Carlo simulation assuming a stable French population of 11- to 14-year-old boys, adult men and men having sex with men. We modelled and quantified the mid-term benefits as the annually prevented ano-genital warts among the 8.72 M men aged 15-35 years and the long-term benefits as the annually prevented anal cancer cases among the 17.4 M men aged 25-65 years. We also estimated the number of Guillain-Barre syndrome cases hypothetically induced by vaccination. RESULTS With a vaccine coverage of 30%, an annual number of 9310 (95% uncertainty interval [7050-11,200]) first ano-genital warts episodes among the 8.72 M men aged 15-35 years are prevented. According to more or less optimistic hypotheses on the proportion of HPV cancers covered by the vaccine, between 15.1 [11.7-17.7] and 19.2 [15.0-22.6] cases of anal cancer among the 17.4 M men aged 25-65 years would be annually avoided. Among men having sex with men, the corresponding figures were 1907 (1944-2291) for ano-genital warts and between 2.0 [0.23-4.5] and 2.6 [0.29-5.7] for anal cancer. Among 11- to 14-year-old boys, 0.82 (0.15-2.3) Guillain-Barre syndrome cases would be induced annually. INTERPRETATION A long-term program of HPV vaccination among boys in France would avoid substantially more cancer cases than hypothetically induce Guillain-Barre syndrome cases, in the general and specifically the homosexual population. Additional benefits may arise with the possible vaccine protection against oro-laryngeal and -pharyngeal cancer.
Collapse
|
28
|
Kamolratanakul S, Pitisuttithum P. Human Papillomavirus Vaccine Efficacy and Effectiveness against Cancer. Vaccines (Basel) 2021; 9:vaccines9121413. [PMID: 34960159 PMCID: PMC8706722 DOI: 10.3390/vaccines9121413] [Citation(s) in RCA: 61] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 11/22/2021] [Accepted: 11/24/2021] [Indexed: 12/11/2022] Open
Abstract
Human papillomavirus (HPV) is the most common sexually transmitted infection, with 15 HPV types related to cervical, anal, oropharyngeal, penile, vulvar, and vaginal cancers. However, cervical cancer remains one of the most common cancers in women, especially in developing countries. Three HPV vaccines have been licensed: bivalent (Cervarix, GSK, Rixensart, Belgium), quadrivalent (Merck, Sharp & Dome (Merck & Co, Whitehouse Station, NJ, USA)), and nonavalent (Merck, Sharp & Dome (Merck & Co, Whitehouse Station, NJ, USA)). The current HPV vaccine recommendations apply to 9 years old and above through the age of 26 years and adults aged 27–45 years who might be at risk of new HPV infection and benefit from vaccination. The primary target population for HPV vaccination recommended by the WHO is girls aged 9–14 years, prior to their becoming sexually active, to undergo a two-dose schedule and girls ≥ 15 years of age, to undergo a three-dose schedule. Safety data for HPV vaccines have indicated that they are safe. The most common adverse side-effect was local symptoms. HPV vaccines are highly immunogenic. The efficacy and effectiveness of vaccines has been remarkably high among young women who were HPV seronegative before vaccination. Vaccine efficacy was lower among women regardless of HPV DNA when vaccinated and among adult women. Comparisons of the efficacy of bivalent, quadrivalent, and nonavalent vaccines against HPV 16/18 showed that they are similar. However, the nonavalent vaccine can provide additional protection against HPV 31/33/45/52/58. In a real-world setting, the notable decrease of HPV 6/11/16/18 among vaccinated women compared with unvaccinated women shows the vaccine to be highly effective. Moreover, the direct effect of the nonavalent vaccine with the cross-protection of bivalent and quadrivalent vaccines results in the reduction of HPV 6/11/16/18/31/33/45/52/58. HPV vaccination has been shown to provide herd protection as well. Two-dose HPV vaccine schedules showed no difference in seroconversion from three-dose schedules. However, the use of a single-dose HPV vaccination schedule remains controversial. For males, the quadrivalent HPV vaccine possibly reduces the incidence of external genital lesions and persistent infection with HPV 6/11/16/18. Evidence regarding the efficacy and risk of HPV vaccination and HIV infection remains limited. HPV vaccination has been shown to be highly effective against oral HPV type 16/18 infection, with a significant percentage of participants developing IgG antibodies in the oral fluid post vaccination. However, the vaccines’ effectiveness in reducing the incidence of and mortality rates from HPV-related head and neck cancers should be observed in the long term. In anal infections and anal intraepithelial neoplasia, the vaccines demonstrate high efficacy. While HPV vaccines are very effective, screening for related cancers, as per guidelines, is still recommended.
Collapse
|
29
|
Huang R, Gan R, Zhang D, Xiao J. The comparative safety of human papillomavirus vaccines: A Bayesian network meta-analysis. J Med Virol 2021; 94:729-736. [PMID: 34453758 DOI: 10.1002/jmv.27304] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2021] [Accepted: 08/26/2021] [Indexed: 12/24/2022]
Abstract
BACKGROUND AND AIMS The safety of human papillomavirus (HPV) vaccines, one of the major challenges to public vaccination, has been controversial. This study assessed the adverse reactions of various HPV vaccines, including bivalent HPV (2vHPV), quadrivalent HPV (4vHPV), and 9-valent HPV (9vHPV) vaccines. METHODS PubMed, Embase, and Central databases were searched for randomized controlled trials (RCTs) on the comparative safety of HPV vaccines. A network meta-analysis was performed based on the Bayesian framework random-effects model. RESULTS This study included 23 RCTs. Analysis across these reports indicated that the 2vHPV vaccine was associated with significantly more systemic adverse events than the 4vHPV vaccine (risk ratio [RR]: 1.28, 95% credible interval [CrI]: 1.14-1.44), 9vHPV vaccine (RR: 1.25, 95% CrI: 1.06-1.49), and placebo (RR: 1.31, 95% CrI: 1.18-1.46). However, there were no statistically significant differences in serious adverse events between the vaccinated and placebo groups. For injection-site adverse events, there were substantial inconsistencies between the direct and indirect effects; therefore, the analysis results of the safety were presented only for systemic and serious adverse events. CONCLUSIONS The 2vHPV vaccine resulted in more systemic adverse events than other vaccines and placebo. No significant differences in serious adverse events were observed. Further studies are needed to obtain more information regarding the safety of HPV vaccines.
Collapse
Affiliation(s)
- Rongdong Huang
- Center for Vaccine Clinical Research, Fujian Provincial Center for Disease Control and Prevention, Fuzhou, China
| | - Ruihuan Gan
- Department of Preventive Dentistry, Affiliated Stomatological Hospital, Fujian Medical University, Fuzhou, China
| | - Dongjuan Zhang
- Center for Vaccine Clinical Research, Fujian Provincial Center for Disease Control and Prevention, Fuzhou, China
| | - Jianxiong Xiao
- Center for Vaccine Clinical Research, Fujian Provincial Center for Disease Control and Prevention, Fuzhou, China
| |
Collapse
|
30
|
Osmani V, Klug SJ. [HPV vaccination and the prevention of genital warts and precancerous lesions-current evidence and evaluation]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2021; 64:590-599. [PMID: 33851224 PMCID: PMC8087596 DOI: 10.1007/s00103-021-03316-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 03/16/2021] [Indexed: 01/22/2023]
Abstract
Human papillomaviruses (HPVs) can cause both benign and malignant tumors. To date, more than 200 HPV types have been discovered, of which 12 are currently classified as high risk for cervical cancer. HPV types that affect the anogenital tract are sexually transmitted. Since 2006, prophylactic HPV vaccines have been available and should be administered before first sexual contact.HPVs infect epithelial cells and are worldwide the most common sexually transmitted viruses. Apart from cervical cancer, HPVs cause other anogenital cancers such as vulvar, vaginal, and anal cancer but also oropharyngeal cancer (or head and neck cancers). HPV types 16 and 18 are also found at these sites. HPV types 6 and 11 are associated with genital warts; other HPV types can cause harmless skin warts.HPV vaccines are safe and highly effective, if they are administered before exposure to HPV. Systematic reviews and meta-analyses have shown that HPV vaccination effectively prevents HPV infection, but also precancerous lesions of the anogenital tract and genital warts. Recent vaccination data also demonstrate reductions in cervical cancer incidence.The uptake rates of HPV vaccination vary worldwide by program and acceptance. In comparison to other European countries, Germany has a low uptake rate. The Standing Committee on Vaccination (STIKO) recommends HPV vaccinations for all girls and boys ages 9 to 14 years in Germany. In 2018, only half of all 18-year-old girls in Germany were completely immunized against HPV.Organized vaccination programs, whether population-based or school-based, are necessary in order to increase vaccination uptake rates.
Collapse
Affiliation(s)
- Vanesa Osmani
- Lehrstuhl für Epidemiologie, Fakultät für Sport- und Gesundheitswissenschaften, Technische Universität München, Georg-Brauchle-Ring 56, 80992, München, Deutschland
| | - Stefanie J Klug
- Lehrstuhl für Epidemiologie, Fakultät für Sport- und Gesundheitswissenschaften, Technische Universität München, Georg-Brauchle-Ring 56, 80992, München, Deutschland.
| |
Collapse
|
31
|
Cabral-Romero C, García-Cuellar CM, Hernandez-Delgadillo R, Sánchez-Pérez Y, Meester I, Solís-Soto JM, Pineda-Aguilar N, Chellam S. Synergistic Antitumor Activity of Gramicidin/Lipophilic Bismuth Nanoparticles (BisBAL NPs) on Human Cervical Tumor Cells. FRONTIERS IN NANOTECHNOLOGY 2021. [DOI: 10.3389/fnano.2021.633604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The objective of this study was to study the synergistic antitumor effect of lipophilic bismuth nanoparticles (BisBAL NPs) with the antibiotic solution Neo-Poly gramicidin on human cervical tumor cells. The effect of BisBAL NPs and Neo-Poly gramicidin solution on cervical cancer cell line (HeLa) was determined by the MTT cell viability assay and fluorescence microscopy. After a 24-h exposure to 0.1× Neo-Poly gramicidin HeLa cell growth decreased 94%. Fluorescence microscopy confirmed the antitumor effect cell death was higher among treated than among non-treated cells cells. Individually, gramicidin (0.04 mg/mL) inhibited HeLa tumor cell growth most (40%), and neomycin (0.04 mg/mL) least (21%). Gramicidin (0.3 mg/mL) in combination with different concentrations (1–150 μM) of BisBAL NPs had a synergistic antitumor effect against HeLa cells, reaching an < 86% tumor growth inhibition. As far as we know, we are the first to describe the antitumor activity of the antibiotic Neo-Poly gramicidin on a human cervical cancer cell line. The action mechanism of gramicidin/BisBAL NP is based on a strong damage on cell membrane and nucleus of tumor cells. A synergistic effect of gramicidin with BisBAL NPs may be useful as an alternative therapy for cervical cancer patients.
Collapse
|
32
|
Villa A, Chmieliauskaite M, Patton LL. Including vaccinations in the scope of dental practice: The time has come. J Am Dent Assoc 2021; 152:184-186. [PMID: 33436264 PMCID: PMC7796798 DOI: 10.1016/j.adaj.2020.09.025] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Revised: 09/15/2020] [Accepted: 09/19/2020] [Indexed: 11/27/2022]
|
33
|
Bovbjerg ML. Current Resources for Evidence-Based Practice, September 2020. J Obstet Gynecol Neonatal Nurs 2020; 49:487-499. [PMID: 32805207 PMCID: PMC7428455 DOI: 10.1016/j.jogn.2020.08.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
An extensive review of new resources to support the provision of evidence-based care for women and infants. The current column includes a discussion of “spin” in scientific reporting and its effect on summaries and syntheses of the literature and commentaries on reviews about early versus late amniotomy as part of labor induction protocols and the economic burden associated with maternal morbidity.
Collapse
|
34
|
Sonawane K, Zhu Y, Montealegre JR, Lairson DR, Bauer C, McGee LU, Giuliano AR, Deshmukh AA. Parental intent to initiate and complete the human papillomavirus vaccine series in the USA: a nationwide, cross-sectional survey. Lancet Public Health 2020; 5:e484-e492. [PMID: 32707126 PMCID: PMC7484349 DOI: 10.1016/s2468-2667(20)30139-0] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2020] [Revised: 05/29/2020] [Accepted: 06/05/2020] [Indexed: 01/30/2023]
Abstract
BACKGROUND Human papillomavirus (HPV) vaccine uptake among US adolescents is primarily dependent on the intent of their parents. To the best of our knowledge, an analysis quantifying parental intent to initiate and complete the HPV vaccine series in the USA at both the national and state level has not been done. We aim to estimate parental intent to initiate and complete the HPV vaccine series at the national-level and state-level and to identify reasons for lack of intent to initiate and complete the vaccine series. METHODS This cross-sectional study uses data from the adolescent component of the 2017-18 National Immunization Survey (NIS-Teen). Study participants were parents or caregivers of US adolescents aged 13-17 years, who were most knowledgeable about the immunisation status of the adolescents. The primary outcome was parental intent to vaccinate the adolescent in the next 12 months. The secondary outcomes were (1) the prevalence of reasons given for lack of intent to initiate and complete the HPV vaccine series, and (2) the relationship between receiving a recommendation from a health-care provider to vaccinate and intent to initiate the vaccination series. We computed national-level and state-level estimates for parental lack of intent to initiate and to complete the vaccine series; population-level estimates were derived using survey weights. A survey design-adjusted Wald F test was used for bivariate analysis. A multivariate logistic regression model was used to examine the association between health-care provider recommendation and parental intent to initiate the series. Analyses were stratified by history of health-care provider recommendation to initiate the HPV vaccine series. FINDINGS In 2017-18, the parent or caregiver of 82 297 US adolescents aged 13-17 years completed the NIS-Teen survey. 30 558 (37·1%) were unvaccinated and 9073 (10·8%) received only one HPV vaccine dose. Parents of 58·0% (17 171/29 086) of unvaccinated adolescents with data available on parental intent had no intention to initiate the HPV vaccine series. More than 65% of parents of unvaccinated adolescents in Idaho, Kansas, Michigan, Montana, Nebraska, North Dakota, Oklahoma, and Utah had no intention to initiate the HPV vaccine series. Parents of 23·5% (2166/9072) of initiators with data available on parental intent had no intention to complete the HPV vaccine series. More than 30% of parents in Arkansas, Florida, Georgia, Hawaii, Idaho, Utah, and West Virginia did not intend to complete the HPV vaccine series, whereas in the District of Columbia (11·2% [22/166]) and Rhode Island (20·4% [21/112]) parental lack of intent was relatively low (both regions have an HPV vaccine mandate). The most common reason for lack of intent among parents to initiate the vaccine for unvaccinated adolescents was safety concerns (22·8% [4182/16 455]); lack of a recommendation from a health-care provider (22·2% [440/1944]) was the most frequently cited reason for absence of intent to complete the series among parents of adolescents who received only one HPV vaccine dose. Receipt of a recommendation from a health-care provider was associated with greater odds of parental intent to initiate the HPV vaccine series (odds ratio 1·11, 95% CI 1·01-1·22). 45·5% (13 156/29 086) of parents of unvaccinated adolescents had reportedly received an HPV vaccine recommendation. Parents of 60·6% (7938/13 156) of unvaccinated adolescents with a recommendation from a health-care provider and data available on parental intent had no intention to initiate the series. INTERPRETATION Lack of parental intent to initiate and complete the HPV vaccine series for adolescents is a major public health concern in the USA. Combating vaccine safety concerns and strong recommendations from health-care providers could improve the currently suboptimal HPV vaccination coverage. FUNDING US National Cancer Institute.
Collapse
Affiliation(s)
- Kalyani Sonawane
- Center for Healthcare Data, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, USA.
| | - Yenan Zhu
- Department of Management, Policy, and Community Health, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, USA
| | | | - David R Lairson
- Center for Health Services Research, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Cici Bauer
- Department of Biostatistics and Data Science, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Lindy U McGee
- Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Anna R Giuliano
- Center for Immunization and Infection Research in Cancer, Moffitt Cancer Center, Tampa, FL, USA
| | - Ashish A Deshmukh
- Center for Health Services Research, School of Public Health, University of Texas Health Science Center at Houston, Houston, TX, USA
| |
Collapse
|
35
|
Abstract
BACKGROUND Human papillomavirus (HPV) is a sexually transmitted oncovirus associated with several malignancies, including oropharyngeal squamous cell carcinoma. The 9-valent HPV vaccine can help protect against the high-risk HPV strains most commonly associated with HPV-related cancers. METHODS The authors used an electronic survey to assess the roles of dentists and their team members in discussing the HPV vaccine, as well as administering the vaccine in a dental setting. On December 6, 2019, the authors e-mailed a survey link to the American Dental Association Clinical Evaluators (ACE) Panel (n = 813), a sample of American Dental Association member dentists. After 1 e-mail reminder, the survey closed on December 19, 2019, and the authors conducted exploratory and descriptive data analyses using SAS Version 9.4 (SAS). RESULTS A total of 329 dentists responded to the survey, and 83 (25%) of them reported that they or their team members discuss the implications of the HPV vaccine with age-eligible patients or their parents or guardians. Dentists lead two-thirds (n = 218) of the discussions, and the clinical examination is the most frequent moment during the patient visit in which HPV-related topics are discussed. Some of the top reasons respondents mentioned for not discussing the vaccine in their practice were the perception that these discussions are best left to other health care professionals and not knowing how to address the topic with patients. If the scope of dental practice is expanded to include administering the vaccine, 125 (38%) of respondents would feel uncomfortable administering the vaccine. The most common potential barriers to administering the vaccine in a dental setting include obtaining reimbursement and vaccine management and preservation. CONCLUSIONS The survey results suggest that dentists' comfort levels and perceived roles in discussing and administering the HPV vaccine vary. PRACTICAL IMPLICATIONS There is a need to further define the role of dentists and their team members in the promotion and administration of the HPV vaccine. Resources for dentists and dental team members may be helpful to support professional education and communication about the HPV vaccine.
Collapse
|