1
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Anderson R, Kim S, Roberts N, Petrou S. Systematic review of economic evaluations of varicella vaccination programmes. PLoS One 2023; 18:e0282327. [PMID: 36972249 PMCID: PMC10042376 DOI: 10.1371/journal.pone.0282327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 02/14/2023] [Indexed: 03/29/2023] Open
Abstract
OBJECTIVES This study carried out a systematic literature review of economic evaluations of varicella vaccination programmes from the earliest publication to the present day, including programmes in the workplace and in special risk groups as well as universal childhood vaccination and catch up programmes. METHODS Articles published from 1985 until 2022 were sourced from PubMed/Medline, Embase, Web of Science, NHSEED and Econlit. Eligible economic evaluations, which included posters and conference abstracts, were identified by two reviewers who scrutinised each other's selections at both title and abstract and full report stages. The studies are described in terms of their methodological characteristics. Their results are aggregated by type of vaccination programme and the nature of the economic outcome. RESULTS A total of 2575 articles were identified of which 79 qualified as economic evaluations. A total of 55 studies focused on universal childhood vaccination, 10 on the workplace and 14 on high risk groups. Twenty-seven studies reported estimates of incremental cost per quality-adjusted life year (QALY) gained, 16 reported benefit-cost ratios, 20 reported cost-effectiveness outcomes in terms of incremental cost per event or life saved and 16 reported cost-cost offset results. Most studies of universal childhood vaccination reported an increase in overall costs to health services, but often a reduction in cost from a societal perspective. CONCLUSIONS The evidence surrounding the cost-effectiveness of varicella vaccination programmes remains sparse with contrasting conclusions in some areas. Future research should particularly aim to encompass the impact of universal childhood vaccination programmes on herpes zoster among adults.
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Affiliation(s)
- Robert Anderson
- Centre for Health Service Economics and Organisation, Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
| | - Sungwook Kim
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
| | - Nia Roberts
- Health Care Libraries, Bodleian Libraries, University of Oxford, Oxford, United Kingdom
| | - Stavros Petrou
- Nuffield Department of Primary Care Health Sciences, University of Oxford, Oxford, United Kingdom
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2
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Müller F, Chandra S, Wright V, Rashid M, Redditt V. Concordance of self-reported varicella history and serology among adolescent and adult refugee patients at a primary care clinic in Toronto, Canada. Vaccine 2021; 39:6391-6397. [PMID: 34563396 DOI: 10.1016/j.vaccine.2021.09.027] [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: 10/29/2020] [Revised: 09/02/2021] [Accepted: 09/08/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Previous studies have found higher rates of varicella susceptibility among migrants from tropical regions. This study seeks to estimate the prevalence of varicella susceptibility in a cohort of newly arrived refugees and refugee claimants at a primary care clinic in Toronto and to compare patients' self-reported history of varicella infection with serologic test results. METHODS We conducted a retrospective chart review of 1888 refugee patients aged 13 years and older rostered at a specialized primary care clinic in Toronto from December 2011 to October 2017. Basic sociodemographic variables, self-reported varicella history, and varicella serologic results were examined. RESULTS Based on serologic testing, 8.5% of individuals were varicella non-immune, with highest rates of varicella susceptibility among adolescents aged 13-19 years (13.5%). All adults over age 60 were varicella immune on serology (n = 56). A positive self-reported history of varicella infection was strongly predictive of varicella immunity on serology (PPV 96.8%; 95% CI: 95.2-97.9). A self-reported history of no prior varicella infection did not correlate reliably with serologic test results (NPV 15.8%; 95% CI: 13.3-18.0). A substantial proportion of patients (34.1%) were unsure of their varicella history. CONCLUSION Identification and immunization of varicella susceptible refugee newcomers remains a health care priority. Self-reported history of varicella infection had mixed reliability as a predictor of varicella immunity.
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Affiliation(s)
- Frank Müller
- Crossroads Clinic Women's College Hospital 76 Grenville Street, Toronto ON, M5S 1B2, Canada; Department of General Practice, University Medical Center Göttingen/Georg-August-University, Humboldtallee 38, 37073 Göttingen, Germany.
| | - Shivani Chandra
- Crossroads Clinic Women's College Hospital 76 Grenville Street, Toronto ON, M5S 1B2, Canada; Women's College Hospital Institute for Health System Solutions and Virtual Care Women's College Hospital 76 Grenville Street, Toronto, ON M5S 1B2, Canada.
| | - Vanessa Wright
- Crossroads Clinic Women's College Hospital 76 Grenville Street, Toronto ON, M5S 1B2, Canada.
| | - Meb Rashid
- Crossroads Clinic Women's College Hospital 76 Grenville Street, Toronto ON, M5S 1B2, Canada; Department of Family and Community Medicine, University of Toronto, 500 University Ave, Toronto, ON M5G 1V7, Canada.
| | - Vanessa Redditt
- Crossroads Clinic Women's College Hospital 76 Grenville Street, Toronto ON, M5S 1B2, Canada; Women's College Hospital Institute for Health System Solutions and Virtual Care Women's College Hospital 76 Grenville Street, Toronto, ON M5S 1B2, Canada; Department of Family and Community Medicine, University of Toronto, 500 University Ave, Toronto, ON M5G 1V7, Canada.
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3
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Benchimol EI, Tse F, Carroll MW, deBruyn JC, McNeil SA, Pham-Huy A, Seow CH, Barrett LL, Bessissow T, Carman N, Melmed GY, Vanderkooi OG, Marshall JK, Jones JL. Canadian Association of Gastroenterology Clinical Practice Guideline for Immunizations in Patients With Inflammatory Bowel Disease (IBD)-Part 1: Live Vaccines. J Can Assoc Gastroenterol 2021; 4:e59-e71. [PMID: 34476338 PMCID: PMC8407487 DOI: 10.1093/jcag/gwab015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Accepted: 12/16/2020] [Indexed: 12/16/2022] Open
Abstract
Background & Aims Patients with inflammatory bowel disease (IBD) may be at increased risk of
some vaccine-preventable diseases. The effectiveness and safety of
vaccinations may be altered by immunosuppressive therapies or IBD itself.
These recommendations, developed by the Canadian Association of
Gastroenterology and endorsed by the American Gastroenterological
Association, aim to provide guidance on immunizations in patients with
inflammatory bowel disease. This publication focused on live vaccines. Methods Systematic reviews evaluating the efficacy, effectiveness, and safety of
vaccines in patients with IBD, other immune-mediated inflammatory diseases,
and the general population were performed. Critical outcomes included
mortality, vaccine-preventable diseases, and serious adverse events.
Immunogenicity was considered a surrogate outcome for vaccine efficacy.
Certainty of evidence and strength of recommendations were rated according
to the GRADE (Grading of Recommendation Assessment, Development, and
Evaluation) approach. Key questions were developed through an iterative
process and voted on by a multidisciplinary panel. Recommendations were
formulated using the Evidence-to-Decision framework. Strong recommendation
means that most patients should receive the recommended course of action,
whereas a conditional recommendation means that different choices will be
appropriate for different patients. Results Three good practice statements included reviewing a patient’s
vaccination status at diagnosis and at regular intervals, giving appropriate
vaccinations as soon as possible, and not delaying urgently needed
immunosuppressive therapy to provide vaccinations. There are 4
recommendations on the use of live vaccines. Measles, mumps, rubella vaccine
is recommended for both adult and pediatric patients with IBD not on
immunosuppressive therapy, but not for those using immunosuppressive
medications (conditional). Varicella vaccine is recommended for pediatric
patients with IBD not on immunosuppressive therapy, but not for those using
immunosuppressive medications (conditional). For adults, recommendations are
conditionally in favor of varicella vaccine for those not on
immunosuppressive therapy, and against for those on therapy. No
recommendation was made regarding the use of live vaccines in infants born
to mothers using biologics because the desirable and undesirable effects
were closely balanced and the evidence was insufficient. Conclusions Maintaining appropriate vaccination status in patients with IBD is critical
to optimize patient outcomes. In general, live vaccines are recommended in
patients not on immunosuppressive therapy, but not for those using
immunosuppressive medications. Additional studies are needed to evaluate the
safety and efficacy of live vaccines in patients on immunosuppressive
therapy.
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Affiliation(s)
- Eric I Benchimol
- Department of Pediatrics and School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada.,CHEO Inflammatory Bowel Disease Centre, Division of Gastroenterology, Hepatology and Nutrition, Children's Hospital of Eastern Ontario, and CHEO Research Institute, Ottawa, Ontario, Canada.,Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada, SickKids Inflammatory Bowel Disease Centre, Division of Gastroenterology Hepatology and Nutrition, The Hospital for Sick Children, Child Health Evaluative Sciences, SickKids Research Institute, ICES, Toronto, Ontario, Canada
| | - Frances Tse
- Division of Gastroenterology and Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Matthew W Carroll
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Jennifer C deBruyn
- Section of Pediatric Gastroenterology, Departments of Pediatrics and Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Shelly A McNeil
- Division of Infectious Diseases, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Anne Pham-Huy
- Division of Infectious Diseases, Immunology and Allergy, Department of Pediatrics, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ontario
| | - Cynthia H Seow
- Division of Gastroenterology, Departments of Medicine and Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Lisa L Barrett
- Division of Infectious Diseases, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Talat Bessissow
- Division of Gastroenterology, McGill University Health Centre, Montreal, Quebec, Canada
| | - Nicholas Carman
- Department of Pediatrics, University of Ottawa, Ottawa, Ontario, Canada.,CHEO Inflammatory Bowel Disease Centre, Division of Gastroenterology, Hepatology and Nutrition, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Gil Y Melmed
- Department of Pediatrics, University of Ottawa, Ottawa, Ontario, Canada.,CHEO Inflammatory Bowel Disease Centre, Division of Gastroenterology, Hepatology and Nutrition, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Otto G Vanderkooi
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California.,Section of Infectious Diseases, Departments of Pediatrics, Microbiology, Immunology and Infectious Diseases, Pathology and Laboratory Medicine and Community Health Sciences, University of Calgary, Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
| | - John K Marshall
- Division of Gastroenterology and Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Jennifer L Jones
- Department of Medicine and Community Health and Epidemiology, Dalhousie University, Queen Elizabeth II Health Sciences Center, Halifax, Nova Scotia, Canada
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4
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Wang Q, Xiu S, Yang L, Huang J, Cui T, Shi N, Wang X, Shen Y, Chen E, Lu B, Jin H, Lin L. Economic evaluation of varicella vaccination strategies in Jiangsu province, China: a decision-tree Markov model. Hum Vaccin Immunother 2021; 17:4194-4202. [PMID: 34357833 DOI: 10.1080/21645515.2021.1958608] [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: 10/20/2022] Open
Abstract
This study evaluated different varicella vaccination strategies in Jiangsu province, China. A decision-tree Markov model was used to evaluate the cost effectiveness of various varicella vaccination strategies for children, including direct and selective vaccination (serotesting pre-vaccination). A cohort of one-year-old children was followed through 60 one-year Markov cycles. The parameter estimation was based on field work, the literature, and statistical yearbooks. We calculated the incremental cost-utility ratio (ICUR) using the saved quality-adjusted life year (QALY). One-way and probability sensitivity analyses were performed to assess uncertainty. Among 100,000 cohort members, one-dose and two-dose direct vaccination averted 8061 and 10,701 varicella cases, respectively, compared with no vaccination. Furthermore, compared with no vaccination, one-dose and two-dose direct vaccination saved one QALY at the ICUR of USD 21,401.33 and USD 35,420.81, respectively, at less than three times the per capita gross domestic product (USD 47,626.86) of Jiangsu. The ICURs of the one-dose and two-dose selective strategies versus no vaccination were USD 42,623.62 and USD 51,406.35 per QALY gained, respectively. The cost effectiveness results were most sensitive to the QALY loss of outpatients and vaccine prices. Thus, in Jiangsu, one-dose and two-dose direct varicella vaccination in children could be cost effective at the willingness to pay threshold of three times provincial GDP per capita from a societal perspective. The findings were sensitive to the vaccine price and health utility of varicella cases.
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Affiliation(s)
- Qiang Wang
- Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, PR China.,Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, PR China
| | - Shixin Xiu
- Department of Immunization Planning, Wuxi Center for Disease Control and Prevention, Wuxi, PR China
| | - Liuqing Yang
- Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, PR China.,Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, PR China
| | - Jinxin Huang
- Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, PR China.,Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, PR China
| | - Tingting Cui
- Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, PR China.,Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, PR China
| | - Naiyang Shi
- Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, PR China.,Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, PR China
| | - Xuwen Wang
- Department of Immunization Planning, Wuxi Center for Disease Control and Prevention, Wuxi, PR China
| | - Yuan Shen
- Department of Immunization Planning, Wuxi Center for Disease Control and Prevention, Wuxi, PR China
| | - Enpin Chen
- Department of Immunization Planning, Wuxi Center for Disease Control and Prevention, Wuxi, PR China
| | - Bing Lu
- Department of Immunization Planning, Wuxi Center for Disease Control and Prevention, Wuxi, PR China
| | - Hui Jin
- Department of Epidemiology and Health Statistics, School of Public Health, Southeast University, Nanjing, PR China.,Key Laboratory of Environmental Medicine Engineering, Ministry of Education, School of Public Health, Southeast University, Nanjing, PR China
| | - Leesa Lin
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK.,Laboratory of Data Discovery for Health (D24H), Hong Kong Science Park, Hong Kong, China
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5
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Benchimol EI, Tse F, Carroll MW, deBruyn JC, McNeil SA, Pham-Huy A, Seow CH, Barrett LL, Bessissow T, Carman N, Melmed GY, Vanderkooi OG, Marshall JK, Jones JL. Canadian Association of Gastroenterology Clinical Practice Guideline for Immunizations in Patients With Inflammatory Bowel Disease (IBD)-Part 1: Live Vaccines. Gastroenterology 2021; 161:669-680.e0. [PMID: 33617891 DOI: 10.1053/j.gastro.2020.12.079] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/16/2020] [Revised: 12/10/2020] [Accepted: 12/16/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND & AIMS Patients with inflammatory bowel disease (IBD) may be at increased risk of some vaccine-preventable diseases. The effectiveness and safety of vaccinations may be altered by immunosuppressive therapies or IBD itself. These recommendations developed by the Canadian Association of Gastroenterology and endorsed by the American Gastroenterological Association, aim to provide guidance on immunizations in adult and pediatric patients with IBD. This publication focused on live vaccines. METHODS Systematic reviews evaluating the efficacy, effectiveness, and safety of vaccines in patients with IBD, other immune-mediated inflammatory diseases, and the general population were performed. Critical outcomes included mortality, vaccine-preventable diseases, and serious adverse events. Immunogenicity was considered a surrogate outcome for vaccine efficacy. Certainty of evidence and strength of recommendations were rated according to the GRADE (Grading of Recommendation Assessment, Development, and Evaluation) approach. Key questions were developed through an iterative process and voted on by a multidisciplinary panel. Recommendations were formulated using the Evidence-to-Decision framework. Strong recommendation means that most patients should receive the recommended course of action, whereas a conditional recommendation means that different choices will be appropriate for different patients. RESULTS Three good practice statements included reviewing a patient's vaccination status at diagnosis and at regular intervals, giving appropriate vaccinations as soon as possible, and not delaying urgently needed immunosuppressive therapy to provide vaccinations. There are 4 recommendations on the use of live vaccines. Measles, mumps, rubella vaccine is recommended for both adult and pediatric patients with IBD not on immunosuppressive therapy, but not for those using immunosuppressive medications (conditional). Varicella vaccine is recommended for pediatric patients with IBD not on immunosuppressive therapy, but not for those using immunosuppressive medications (conditional). For adults, recommendations are conditionally in favor of varicella vaccine for those not on immunosuppressive therapy, and against for those on therapy. No recommendation was made regarding the use of live vaccines in infants born to mothers using biologics because the desirable and undesirable effects were closely balanced and the evidence was insufficient. CONCLUSIONS Maintaining appropriate vaccination status in patients with IBD is critical to optimize patient outcomes. In general, live vaccines are recommended in patients not on immunosuppressive therapy, but not for those using immunosuppressive medications. Additional studies are needed to evaluate the safety and efficacy of live vaccines in patients on immunosuppressive therapy.
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Affiliation(s)
- Eric I Benchimol
- Department of Pediatrics and School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada, CHEO Inflammatory Bowel Disease Centre, Division of Gastroenterology, Hepatology and Nutrition, Children's Hospital of Eastern Ontario, and CHEO Research Institute, Ottawa, Ontario, Canada; Department of Paediatrics, University of Toronto, Toronto, Ontario, Canada, SickKids Inflammatory Bowel Disease Centre, Division of Gastroenterology Hepatology and Nutrition, The Hospital for Sick Children, Child Health Evaluative Sciences, SickKids Research Institute, ICES, Toronto, Ontario, Canada
| | - Frances Tse
- Division of Gastroenterology and Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Matthew W Carroll
- Division of Pediatric Gastroenterology, Hepatology and Nutrition, Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Jennifer C deBruyn
- Section of Pediatric Gastroenterology, Departments of Pediatrics and Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Shelly A McNeil
- Division of Infectious Diseases, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Anne Pham-Huy
- Division of Infectious Diseases, Immunology and Allergy, Department of Pediatrics, Children's Hospital of Eastern Ontario, University of Ottawa, Ottawa, Ontario
| | - Cynthia H Seow
- Division of Gastroenterology, Departments of Medicine and Community Health Sciences, University of Calgary, Calgary, Alberta, Canada
| | - Lisa L Barrett
- Division of Infectious Diseases, Department of Medicine, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Talat Bessissow
- Division of Gastroenterology, McGill University Health Centre, Montreal, Quebec, Canada
| | - Nicholas Carman
- Department of Pediatrics, University of Ottawa, Ottawa, Ontario, Canada, CHEO Inflammatory Bowel Disease Centre, Division of Gastroenterology, Hepatology and Nutrition, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Gil Y Melmed
- Inflammatory Bowel Disease Center, Cedars-Sinai Medical Center, Los Angeles, California
| | - Otto G Vanderkooi
- Section of Infectious Diseases, Departments of Pediatrics, Microbiology, Immunology and Infectious Diseases, Pathology and Laboratory Medicine and Community Health Sciences, University of Calgary, Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
| | - John K Marshall
- Division of Gastroenterology and Farncombe Family Digestive Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Jennifer L Jones
- Department of Medicine and Community Health and Epidemiology, Dalhousie University, Queen Elizabeth II Health Sciences Center, Halifax, Nova Scotia, Canada
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6
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Rafferty ERS, McDonald W, Osgood ND, Doroshenko A, Farag M. What We Know Now: An Economic Evaluation of Chickenpox Vaccination and Dose Timing Using an Agent-Based Model. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2021; 24:50-60. [PMID: 33431153 DOI: 10.1016/j.jval.2020.10.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 09/03/2020] [Accepted: 10/05/2020] [Indexed: 06/12/2023]
Abstract
OBJECTIVES The value of chickenpox vaccination is still debated in the literature and by jurisdictions worldwide. This uncertainty is reflected in the inconsistent uptake of the vaccine, where some countries offer routine childhood immunization programs, others have targeted programs, and in many the vaccine is only privately available. Even across the countries that have universal funding for the vaccine, there is a diversity of schedules and dosing intervals. Using an agent-based model of chickenpox and shingles, we conducted an economic evaluation of chickenpox vaccination in Alberta, Canada. METHODS We compared the cost-effectiveness of 2 common chickenpox vaccination schedules, specifically a long dosing interval (first dose: 12 months; second dose: 4-6 years) and a short dosing interval (first dose: 12 months; second dose: 18 months). RESULTS The economic evaluation demonstrated a shorter dosing interval may be marginally preferred, although it consistently led to higher costs from both the societal and healthcare perspectives. We found that chickenpox vaccination would be cost-saving and highly cost-effective from the societal and healthcare perspective, assuming there was no impact on shingles. CONCLUSION Chickenpox vaccine was cost-effective when not considering shingles and remained so even if there was a minor increase in shingles following vaccination. However, if chickenpox vaccination did lead to a substantial increase in shingles, then chickenpox vaccination was not cost-effective from the healthcare perspective.
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Affiliation(s)
- Ellen R S Rafferty
- School of Public Health, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; Faculty of Nursing, Edmonton Clinic Health Academy, University of Alberta, Edmonton, Alberta, Canada.
| | - Wade McDonald
- Department of Computer Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Nathaniel D Osgood
- Department of Computer Science, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Alexander Doroshenko
- Faculty of Medicine and Dentistry, Department of Medicine, Division of Preventive Medicine, University of Alberta, Edmonton, Alberta, Canada
| | - Marwa Farag
- School of Public Health, University of Saskatchewan, Saskatoon, Saskatchewan, Canada; School of Public Administration and Development Economics, Doha Institute for Graduate Studies, Doha, Qatar
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7
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Greenaway C, Greenwald ZR, Akaberi A, Song S, Passos-Castilho AM, Abou Chakra CN, Palayew A, Alabdulkarim B, Platt R, Azoulay L, Brisson M, Quach C. Epidemiology of varicella among immigrants and non-immigrants in Quebec, Canada, before and after the introduction of childhood varicella vaccination: a retrospective cohort study. THE LANCET. INFECTIOUS DISEASES 2020; 21:116-126. [PMID: 32711690 DOI: 10.1016/s1473-3099(20)30277-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 03/05/2020] [Accepted: 03/27/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Many immigrants are susceptible to varicella on arrival to Canada because of different transmission dynamics in their countries of origin and scarcity of vaccination. Universal childhood vaccination programmes decrease varicella incidence rates through herd immunity, but the accumulating number of susceptible adult immigrants could remain at risk for severe varicella. Our aim was to describe the epidemiology of varicella among immigrants and non-immigrants before and after childhood varicella vaccination. METHODS We did a population-based, retrospective cohort study of all varicella cases in Quebec, Canada, diagnosed between 1996 and 2014 in administrative health databases linked to immigration data. Cases of varicella met diagnostic codes in the International Classification of Diseases, Ninth and Tenth Revision Canadian modifications. Cases with a co-occurring zoster diagnostic code and immigrants from Australia, New Zealand, the USA, and western European countries were excluded. Vaccination periods included pre-vaccination (1996-98), private vaccination (1999-2005), and public vaccination (2006-14). Incidence rate and comparative rate ratios were estimated using census data. FINDINGS A total of 231 339 varicella cases diagnosed between Jan 1, 1996, and Dec 31, 2014, were linked to 1 115 696 immigrants who arrived between Jan 1, 1980, and Dec 31, 2014. 1444 herpes zoster cases and 1276 immigrants from Australia, western Europe, New Zealand, and the USA were excluded. Among 228 619 varicella cases, 13 315 (5·8%) occurred in immigrants. In pre-vaccination versus public vaccination periods, varicella incidence declined in immigrants by 87% (95% CI 86·6-87·9; 324·3 cases per 100 000 person-years to 40·9 cases per 100 000 person-years) and in non-immigrants by 93% (92·4-92·7; 484 cases per 100 000 person-years to 36 cases per 100 000 person-years). Mean age at diagnosis increased in both groups (15·1 vs 19·4 years in immigrants and 8·4 vs 12·0 years in non-immigrants). In the public vaccination period, immigrants younger than 50 years had higher varicella rates than non-immigrants, with relative risk ranging from 1·53 (95% CI 1·37-1·72) to 4·64 (3·90-5·53) with the highest risk in adolescents and young adults, and people from Latin America and the Caribbean (age-specific incidence rate ratio [aIRR]I-NI pre-vaccination 2·19 and post-vaccination aIRRI-NI6·07) and south Asia (aIRRI-NI pre-vaccination 3·41 and aIRRI-NI post-vaccination 4·46) and in childbearing women (15-40 years; IRRI-NI 2·48). INTERPRETATION Immigrant adolescents, young adults, and women of childbearing age had higher age-standardised rates of varicella than non-immigrants, with increasing disparities following vaccine introduction. Immigrants younger than 50 years of age would benefit from targeted vaccination upon arrival to host countries. FUNDING The Canadian Institutes of Health Research and The Department of Medicine, Jewish General Hospital, Montreal, QC, Canada.
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Affiliation(s)
- Christina Greenaway
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada; Division of Infectious Diseases, Jewish General Hospital, McGill University, Montreal, QC, Canada; Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada.
| | - Zoe R Greenwald
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada; Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
| | - Arash Akaberi
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada
| | - Sunny Song
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada
| | - Ana Maria Passos-Castilho
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada
| | - Claire Nour Abou Chakra
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada
| | - Adam Palayew
- Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada
| | - Balquis Alabdulkarim
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada
| | - Robert Platt
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada; Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada
| | - Laurent Azoulay
- Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, McGill University, Montreal, QC, Canada; Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada
| | - Marc Brisson
- Research Group in Mathematical Modeling and Health Economics of Infectious Disease, Laval University, QC, Canada
| | - Caroline Quach
- Department of Microbiology, Infectious Diseases and Immunology, University of Montreal, Montreal, QC, Canada
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8
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Abstract
Migration is increasing and practitioners need to be aware of the unique health needs of this population. The prevalence of infectious diseases among migrants varies and generally mirrors that of their countries of origin, but is modified by the circumstance of migration, the presence of pre-arrival screening programs and post arrival access to health care. To optimize the health of migrants practitioners; (1) should take all opportunities to screen migrants at risk for latent infections such as tuberculosis, chronic hepatitis B and C, HIV, strongyloidiasis, schistosomiasis and Chagas disease, (2) update routine vaccines in all age groups and, (3) be aware of "rare and tropical infections" related to migration and return travel.
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Affiliation(s)
- Christina Greenaway
- Division of Infectious Diseases, Jewish General Hospital, Room E0057, 3755 Côte Ste-Catherine Road, Montreal, Quebec H3T 1E2, Canada; Centre for Clinical Epidemiology, Lady Davis Institute for Medical Research, 3755 Côte Ste-Catherine Road, Montreal, Quebec H3T 1E2, Canada; J.D. MacLean Center for Tropical Diseases at McGill, McGill University Health Centre, Glen Site, 1001 Décarie Boulevard, Montreal, Quebec H4A 3J1, Canada.
| | - Francesco Castelli
- University Department of Infectious and Tropical Diseases, University of Brescia and ASST Spedali Civili, Piazza del Mercato, 15, Lombardy, Brescia 25121, Italy; UNESCO Chair "Training and Empowering Human Resources for Health Development in Resource-Limited Countries", University of Brescia, Brescia, Italy
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Varan AK, Lederman ER, Stous SS, Elson D, Freiman JL, Marin M, Lopez AS, Stauffer WM, Joseph RH, Waterman SH. Serological Susceptibility to Varicella Among U.S. Immigration and Customs Enforcement Detainees. JOURNAL OF CORRECTIONAL HEALTH CARE 2017; 24:84-95. [PMID: 28945148 DOI: 10.1177/1078345817727287] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
U.S. Immigration and Customs Enforcement (ICE) is responsible for detaining unauthorized aliens during immigration proceedings. During 2014 to 2015, adult ICE detainees at a California facility were invited to complete a survey concerning self-reported varicella history and risk factors. Participants underwent serological testing for varicella-zoster virus (VZV) IgG; susceptible individuals were offered varicella vaccination. Among 400 detainees with available serology results, 48 (12%) were susceptible to varicella. Self-reported varicella history was negatively associated with susceptibility (adjusted odds ratio = 0.16; 95% confidence interval [0.07, 0.35]). Among 196 detainees reporting a positive history, 95% had VZV IgG levels suggestive of varicella immunity. Among 44 susceptible detainees offered vaccination, 86% accepted. Given relatively high varicella susceptibility, targeted screening and vaccination among ICE detainees lacking a positive history might reduce varicella transmission risks.
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Affiliation(s)
- Aiden K Varan
- 1 CDC/CSTE Applied Epidemiology Fellowship Program, Atlanta, GA, USA.,2 Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, San Diego, CA, USA.,3 County of San Diego Health and Human Services Agency, San Diego, CA, USA
| | - Edith R Lederman
- 4 Immigration and Customs Enforcement Health Service Corps, San Diego, CA, USA
| | - Shanon S Stous
- 4 Immigration and Customs Enforcement Health Service Corps, San Diego, CA, USA
| | - Diana Elson
- 5 Immigration and Customs Enforcement Health Service Corps, Washington, DC, USA
| | - Jennifer L Freiman
- 5 Immigration and Customs Enforcement Health Service Corps, Washington, DC, USA
| | - Mona Marin
- 6 Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Atlanta, GA, USA
| | - Adriana S Lopez
- 6 Centers for Disease Control and Prevention, National Center for Immunization and Respiratory Diseases, Atlanta, GA, USA
| | - William M Stauffer
- 7 Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta, GA, USA.,8 Department of Medicine, University of Minnesota, Minneapolis, MN, USA
| | - Rachael H Joseph
- 7 Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Stephen H Waterman
- 9 Division of Vector-Borne Diseases, Centers for Disease Control and Prevention, San Juan, Puerto Rico
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10
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[Health examination of asylum seekers: A nationwide analysis of state policies in Germany : § 62 of the asylum law]. Bundesgesundheitsblatt Gesundheitsforschung Gesundheitsschutz 2017; 60:108-117. [PMID: 27885404 DOI: 10.1007/s00103-016-2489-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND A health examination of newly arrived asylum seekers, aimed at detecting infectious diseases and preventing disease outbreaks in accommodation facilities, is mandated by national law in all German states. Due to the decentralized German federal system, different state policies are in place and lead to substantial variation in the content and implementation of the health examination. OBJECTIVES To compare health examination policies in the 16 German states with a focus on conducted tests, preventive measures and the general procedure. METHODS A comparative content analysis of policy documents addressing the health examination was conducted. Relevant documents were identified through a nationwide search (conducted June-October 2015) through public sources, inquiries at responsible authorities and interviews with representatives of public health services. RESULTS In the study period, relevant policy documents for 13 states were identified, of which eight were administrative decrees of the responsible state ministries. Policies differed strongly with respect to the content of the health examination and the selection of compulsory screening measures. We identified three main groups: (A) states with compulsory screening limited to measures enshrined in federal law, (B) states with extended tuberculosis screening for children and pregnant women, and (C) states with extended mandatory screening measures for further infectious diseases beyond tuberculosis. Considerable differences were also found with regard to the implementation of the examinations, and the purchasing and re-imbursement policies. CONCLUSIONS The stark heterogeneity in health examination policies between the states cannot be rationally explained from a public health perspective. The indication for certain measures remains unclear. A broad discussion of the medical necessity of screening tests, combined with further systematic analyses, is necessary in order to develop nationwide evidence-based recommendations and decision-making tools for the conduct of health examinations of asylum seekers.
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11
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Rafferty ERS, Gagnon HL, Farag M, Waldner CL. Economic evaluations of vaccines in Canada: a scoping review. COST EFFECTIVENESS AND RESOURCE ALLOCATION 2017; 15:7. [PMID: 28484344 PMCID: PMC5420143 DOI: 10.1186/s12962-017-0069-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2016] [Accepted: 04/28/2017] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND This study aims to summarise and describe the evolution of published economic evaluations of vaccines in Canada, thereby outlining the current state of this expanding and meaningful research. METHODS Using Arksey and O'Malley's scoping review framework we assembled relevant research from both academic and grey literature. Following abstract and full-text review we identified 60 articles to be included in the final analysis. RESULTS We found that since 1988 there has been a steady increase in the number of economic evaluations on vaccines in Canada. Many of these studies focus on the more recently licensed vaccines, such as influenza (16.7%), human papillomavirus (15.0%) and pneumococcal disease (15.0%). Since 2010 economic evaluations of vaccines have shown increased adherence to economic evaluation guidelines (OR = 4.6, CI 1.33, 18.7), suggesting there has been improvement in the consistency and transparency of these studies. However, there remains room for improvement, for instance, we found evidence that studies who stated a conflict of interest are more likely to assert the vaccine of interest was cost-effective (OR = 7.4; CI 1.04, 17.8). Furthermore, most reports use static models that do not consider herd immunity, and only a few evaluate vaccines post-implementation (ex-post) and traveller's vaccinations. CONCLUSION Researchers should examine identified research gaps and continue to improve standardization and transparency when reporting to ensure economic evaluations of vaccines best meet the needs of policy-makers, other researchers and the public.
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Affiliation(s)
- Ellen R S Rafferty
- School of Public Health, University of Saskatchewan, Saskatoon, SK S7N 5A2 Canada
| | | | - Marwa Farag
- School of Public Health, University of Saskatchewan, Saskatoon, SK S7N 5A2 Canada
| | - Cheryl L Waldner
- School of Public Health, University of Saskatchewan, Saskatoon, SK S7N 5A2 Canada
- Western College of Veterinary Medicine, University of Saskatchewan, Saskatoon, SK S7N 5A2 Canada
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Mipatrini D, Stefanelli P, Severoni S, Rezza G. Vaccinations in migrants and refugees: a challenge for European health systems. A systematic review of current scientific evidence. Pathog Glob Health 2017; 111:59-68. [PMID: 28165878 DOI: 10.1080/20477724.2017.1281374] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
The decline of immunization rates in countries of origin of migrants and refugees, along with risky conditions during the journey to Europe, may threaten migrants' health. We performed a systematic review of the scientific literature in order to assess the frequency of vaccine preventable diseases, and vaccination coverage among migrants and refugees in Europe. To this end, Medline and Cochrane databases were considered. After the screening and the selection process, 58 papers were included in the review. We focused on the following vaccine-preventable diseases: hepatitis B, measles, rubella, mumps, tetanus, poliomyelitis, pertussis, diphtheria, meningitis, and varicella. The results were presented as a qualitative synthesis. In summary, several studies highlighted that migrants and refugees have lower immunization rates compared to European-born individuals. Firstly, this is due to low vaccination coverage in the country of origin. Then, several problems may limit migrants' access to vaccination in Europe: (i) migrants are used to move around the continent, and many vaccines require multiple doses at regular times; (ii) information on the immunization status of migrants is often lacking; (iii) hosting countries face severe economic crises; (iv) migrants often refuse registration with medical authorities for fear of legal consequences and (v) the lack of coordination among public health authorities of neighboring countries may determine either duplications or lack of vaccine administration. Possible strategies to overcome these problems include tailoring immunization services on the specific needs of the target population, developing strong communication campaigns, developing vaccination registers, and promoting collaboration among public health authorities of European Countries.
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Affiliation(s)
- Daniele Mipatrini
- a Department of Public Health and Infectious Diseases , Sapienza University , Rome , Italy
| | - Paola Stefanelli
- b Department of Infectious Diseases , Istituto Superiore di Sanità , Rome , Italy
| | - Santino Severoni
- c Division of Policy and Governance for Health and Well-being European Office for Investment for Health and Development , WHO European Office , Copenhagen , Denmark
| | - Giovanni Rezza
- b Department of Infectious Diseases , Istituto Superiore di Sanità , Rome , Italy
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13
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Risk Factors for Varicella Susceptibility Among Refugees to Toronto, Canada. J Immigr Minor Health 2015; 19:6-14. [DOI: 10.1007/s10903-015-0313-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Risk factors for susceptibility to varicella in newly arrived adult migrants in Canada. Epidemiol Infect 2013; 142:1695-707. [PMID: 24176291 DOI: 10.1017/s0950268813002768] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Varicella occurs at an older age in tropical compared to cold climates. Migrants from tropical countries provide the opportunity to gain insights into observed global differences in varicella epidemiology. Severity of varicella increases with age thus, description of risk factors for varicella susceptibility will identify those who would benefit most from vaccination. A total of 1480 migrants, with a mean age of 32 years, were recruited in the pre-vaccination period (2002-2004) in Montreal, Canada. A questionnaire was administered and serum varicella antibodies were measured. Overall 6% were susceptible and ranged from 0·8% to 14·1% in subgroups. Risk factors for susceptibility were younger age, recent arrival, and originating from a tropical country. This could be modified by conditions that increased the probability of person-to-person spread of varicella through direct contact in source countries such as larger community size or household crowding. Many new young adult migrants would benefit from targeted varicella vaccination programmes.
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Rossi C, Schwartzman K, Oxlade O, Klein MB, Greenaway C. Hepatitis B screening and vaccination strategies for newly arrived adult Canadian immigrants and refugees: a cost-effectiveness analysis. PLoS One 2013; 8:e78548. [PMID: 24205255 PMCID: PMC3799697 DOI: 10.1371/journal.pone.0078548] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2013] [Accepted: 09/19/2013] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Immigrants have increased mortality from hepatocellular carcinoma as compared to the host populations, primarily due to undetected chronic hepatitis B virus (HBV) infection. Despite this, there are no systematic programs in most immigrant-receiving countries to screen for chronic HBV infection and immigrants are not routinely offered HBV vaccination outside of the universal childhood vaccination program. METHODS AND FINDINGS A cost-effective analysis was performed to compare four HBV screening and vaccination strategies with no intervention in a hypothetical cohort of newly-arriving adult Canadian immigrants. The strategies considered were a) universal vaccination, b) screening for prior immunity and vaccination, c) chronic HBV screening and treatment, and d) combined screening for chronic HBV and prior immunity, treatment and vaccination. The analysis was performed from a societal perspective, using a Markov model. Seroprevalence estimates, annual transition probabilities, health-care costs (in Canadian dollars), and utilities were obtained from the published literature. Acute HBV infection, mortality from chronic HBV, quality-adjusted life years (QALYs), and costs were modeled over the lifetime of the cohort of immigrants. Costs and QALYs were discounted at a rate of 3% per year. Screening for chronic HBV infection, and offering treatment if indicated, was found to be the most cost-effective intervention and was estimated to cost $40,880 per additional QALY gained, relative to no intervention. This strategy was most cost-effective for immigrants < 55 years of age and would cost < $50,000 per additional QALY gained for immigrants from areas where HBV seroprevalence is ≥ 3%. Strategies that included HBV vaccination were either prohibitively expensive or dominated by the chronic HBV screening strategy. CONCLUSIONS Screening for chronic HBV infection from regions where most Canadian immigrants originate, except for Latin America and the Middle East, was found to be reasonably cost-effective and has the potential to reduce HBV-associated morbidity and mortality.
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Affiliation(s)
- Carmine Rossi
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada
- Centre for Clinical Epidemiology and Community Studies, Jewish General Hospital, Montreal, Canada
| | - Kevin Schwartzman
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada
- Respiratory Epidemiology and Clinical Research Unit, Montreal Chest Institute, Montreal, Canada
- Respiratory Division, McGill University Health Centre, Montreal, Canada
| | - Olivia Oxlade
- Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts, United States of America
| | - Marina B. Klein
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada
- Department of Medicine, Divisions of Infectious Diseases/Immunodeficiency, McGill University Health Centre, Montreal, Canada
| | - Chris Greenaway
- Department of Epidemiology, Biostatistics, and Occupational Health, McGill University, Montreal, Canada
- Centre for Clinical Epidemiology and Community Studies, Jewish General Hospital, Montreal, Canada
- Division of Infectious Diseases, Jewish General Hospital, Montreal, Canada
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van Rijckevorsel GGC, Damen M, Sonder GJ, van der Loeff MFS, van den Hoek A. Seroprevalence of varicella-zoster virus and predictors for seronegativity in the Amsterdam adult population. BMC Infect Dis 2012; 12:140. [PMID: 22721551 PMCID: PMC3434062 DOI: 10.1186/1471-2334-12-140] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Accepted: 06/21/2012] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND In the Netherlands, infection with varicella-zoster virus (VZV) is considered a benign common childhood illness and routine vaccination against VZV is not done. In 1995 it was estimated that 98-100% of the adult Dutch general population is immune, yet the estimate is based on a database in which a relative small number of people of non-Dutch ethnic origin were represented. As the city of Amsterdam has large immigrant communities originating from various subtropical and tropical countries, such as Morocco, Surinam, and Turkey with probably lower VZV transmission, this study aimed to estimate the seroprevalence of VZV IgG antibodies (anti-VZV) among various ethnic groups in Amsterdam, and identify factors associated with seronegative VZV status. METHODS The study was a cross-sectional survey of the Amsterdam population (2004), and the study sample was stratified by age and ethnicity, with deliberate oversampling of minority ethnic groups. Serum samples obtained from 1,341 residents in 2004 were tested for antibodies to VZV. Basic demographic data (gender, age, country of birth, age at immigration and number of children) were also available. RESULTS The anti-VZV seroprevalence in the overall Amsterdam population was estimated to be 94% (95% confidence intervals; 92-96%). Regarding ethnic origin, first generation immigrants (Moroccan immigrants 90%, Surinamese or Antillean immigrants 91%, and Turkish 92%), especially those that migrated after the age of 11 years, were more likely to be anti-VZV seronegative compared to those arriving at an earlier age or those born in the Netherlands (97-98%). Both ethnic origin and generation of immigration were positive predictors for IgG seronegativity to VZV (p<0.015). No other predictors for seronegativity were found. CONCLUSION The results of this study imply that about 4-8% of the general adult Amsterdam population is still susceptible to infection with VZV, and that susceptibility is even higher in some immigrant groups. When assessing the risk of infection after VZV exposure alertness is needed for vulnerable persons like pregnant women, patients with hematological malignancies or organ transplants in particular among first-generation immigrants.
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Affiliation(s)
- Gini G C van Rijckevorsel
- Public Health Service Amsterdam, Department of Infectious Diseases, Nieuwe Achtergracht 100, 1018 WT Amsterdam, the Netherlands.
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Abstract
Varicella-zoster virus causes chickenpox (CP) and after reactivation herpes zoster (HZ). Vaccines are available against both diseases warranting an assessment of the pre-vaccination burden of disease. We collected data from relevant Belgian databases and performed five surveys of CP and HZ patients. The rates at which a general practitioner is visited at least once for CP and HZ are 346 and 378/100 000 person-years, respectively. The average CP and HZ hospitalization rates are 5·3 and 14·2/100 000 person-years respectively. The direct medical cost for HZ is about twice as large as the direct medical cost for CP. The quality-adjusted life years lost for ambulatory CP patients consulting a physician is more than double that of those not consulting a physician (0·010 vs. 0·004). In conclusion, both diseases cause a substantial burden in Belgium.
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Comparison of two strategies to prevent varicella outbreaks in housing facilities for asylum seekers. Int J Infect Dis 2011; 15:e716-21. [DOI: 10.1016/j.ijid.2011.06.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2010] [Revised: 05/31/2011] [Accepted: 06/06/2011] [Indexed: 11/15/2022] Open
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Migrant, Immigrant, and Refugee Health. TROPICAL INFECTIOUS DISEASES: PRINCIPLES, PATHOGENS AND PRACTICE 2011. [PMCID: PMC7150126 DOI: 10.1016/b978-0-7020-3935-5.00127-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Varicella Zoster antibodies among health care workers in a university hospital, Teheran, Iran. Int J Occup Med Environ Health 2010; 23:27-32. [DOI: 10.2478/v10001-010-0011-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Rozenbaum MH, van Hoek AJ, Vegter S, Postma MJ. Cost-effectiveness of varicella vaccination programs: an update of the literature. Expert Rev Vaccines 2008; 7:753-82. [PMID: 18665775 DOI: 10.1586/14760584.7.6.753] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Varicella is one of the most common infectious diseases in childhood, caused by the varicella zoster virus. Although vaccines are available, there are only a few countries with an early-childhood vaccination program. Most countries mainly focus on vaccination of high-risk groups, such as susceptible healthcare workers. One of the main concerns with a routine early-childhood vaccination program is a potential (temporal) increase of the incidence of herpes zoster among elderly adults. In this review, we focus on the cost-effectiveness of varicella vaccination and on the methodology used in the health-economic studies. In particular, we focus on the perspective adopted, type of model used, the modeled effect on herpes zoster, the vaccine efficacy and price, and on the value of time lost by infection. The vast majority of studies show vaccination of high-risk groups - including susceptible adolescents - to be cost saving. Routine early-childhood vaccination programs are always cost saving if indirect costs of production losses are included, or cost effective, as long as the potential negative effects on zoster are not taken into account. We note that most studies included in the review used old vaccine prices and a single dose of the varicella vaccine, whereas multiple doses are now becoming the standard. Despite that, those aspects limit the timeliness of our review and we believe that the current work does provide useful insights in the cost-effectiveness of varicella vaccination.
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Affiliation(s)
- Mark H Rozenbaum
- Groningen Research Institute of Pharmacy (GRIP), University of Groningen, Antonius Deusinglaan 1, 9713 AV Groningen, The Netherlands.
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Lee GM. Varicella Vaccination in Adults: Is It Cost-Effective? Clin Infect Dis 2007; 44:1049-50. [PMID: 17366447 DOI: 10.1086/512744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2007] [Accepted: 01/05/2007] [Indexed: 11/03/2022] Open
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