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Olu OO, Usman A, Ameda IM, Ejiofor N, Mantchombe F, Chamla D, Nabyonga-Orem J. The Chronic Cholera Situation in Africa: Why Are African Countries Unable to Tame the Well-Known Lion? Health Serv Insights 2023; 16:11786329231211964. [PMID: 38028119 PMCID: PMC10647958 DOI: 10.1177/11786329231211964] [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: 05/28/2023] [Accepted: 10/16/2023] [Indexed: 12/01/2023] Open
Abstract
Seven years to the Global Taskforce on Cholera Control's target of reducing cholera cases and deaths by 90% by 2030, Africa continues to experience a high incidence of the disease. In the last 20 years, more than 2.6 million cases and 60 000 deaths of the disease have been recorded, mostly in sub-Saharan Africa. Case Fatality Ratio remains consistently above the WHO-recommended 1% with a yearly average of 2.2%. Between 1 January 2022 and 16 July 2023, fourteen African countries reported 213 443 cases and 3951 deaths (CFR, 1.9%) of the disease. In this perspective article, based on available literature and the authors' field experiences in Africa, we discuss the underlying reasons for the sustained transmission of the disease. We posit that in addition to the well-known risk factors for the disease, the chronic cholera situation in Africa is due to the poor socioeconomic development status, weak household and community resilience, low literacy levels, weak capacity of African countries to implement the 2005 International Health Regulation and the pervasively weak health system on the continent. Stemming this tide requires good leadership, partnership, political commitment, and equity in access to health services, water, and sanitation. Therefore, we recommend that African governments and stakeholders recognize and approach cholera prevention and control from the long-term development lens and leverage the current cholera emergency preparedness and response efforts on the continent to strengthen the affected countries' health, water, and sanitation systems. We call on international organizations such as WHO and the Africa Centres for Diseases Control to support African governments in scaling up research and innovations aimed at better characterizing the epidemiology of cholera and developing evidence-based, context-specific, and innovative strategies for its prevention and control. These recommendations require long-term multisectoral and multidisciplinary approaches.
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Affiliation(s)
| | - Abdulmumini Usman
- World Health Organization Regional Office for Africa, Brazzaville, Congo
| | - Ida Marie Ameda
- United Nations Children Fund Eastern and Southern African Regional Office, Nairobi, Kenya
| | - Nonso Ejiofor
- World Health Organization Regional Office for Africa, Brazzaville, Congo
| | - Freddie Mantchombe
- World Health Organization Regional Office for Africa, Brazzaville, Congo
| | - Dick Chamla
- World Health Organization Regional Office for Africa, Brazzaville, Congo
| | - Juliet Nabyonga-Orem
- World Health Organization Regional Office for Africa, Brazzaville, Congo
- Centre for Health Professions Education, Faculty of Health Sciences, North-West University, Potchefstroom Campus, South Africa
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Rotavirus Infection and Genotyping in Yantai, Shandong Province, 2017-2019. Trop Med Infect Dis 2023; 8:tropicalmed8020101. [PMID: 36828517 PMCID: PMC9963496 DOI: 10.3390/tropicalmed8020101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 01/16/2023] [Accepted: 01/30/2023] [Indexed: 02/05/2023] Open
Abstract
PURPOSE Rotavirus (RV) ranked first among infectious diarrhea-causing pathogens in Yantai from 2017 to 2019. This study investigated the seroserotypes of RV in Yantai, Shandong, from 2017 to 2019 to identify the dominant serotypes and explore the epidemic pattern, aiming to effectively reduce the infection rate, better guide vaccination, and help in epidemiological prevention and control. METHODS A total of 2227 human diarrhea samples were collected from 2017 to 2019 in Yantai. The VP7 (G serotype) and VP4 (P serotype) genes of 467 RV-positive samples were amplified using two-round nested reverse transcription-polymerase chain reaction for G/P genotyping. RESULTS The genotyping results of RV in Yantai from 2017 to 2019 revealed that G9 was the dominant serotype for all G serotypes, P[8] was the dominant serotype for all P serotypes, and G9P[8] was the dominant serotype for all G/P combinations. G9 serotype accounted for 60.84%, 95.65%, and 83.76% of the total RV samples collected in 2017, 2018, and 2019, respectively. P[8] accounted for 75.52%, 94.69%, and 88.89% of the RV-positive samples collected in 2017, 2018, and 2019, respectively. G9P[8] accounted for 60.84%, 94.69%, and 83.76% of the total RV samples collected in 2017, 2018, and 2019, respectively. Of the total 467 samples from 2017 to 2019, G2P[4] accounted for 3.64% (17/467), G3P[8] for 1.28% (6/467), and G1P[8] for 0.86% (4/467). CONCLUSION This study revealed the epidemiological characteristics of RV infection and the development pattern of dominant serotypes in Yantai in recent years, guiding the selection of RV vaccines. The prioritization of vaccines containing G9 serotype for infants in Yantai in recent years is recommended.
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Boisson A, Goel V, Yotebieng M, Parr JB, Fried B, Thompson P. Implementation Approaches for Introducing and Overcoming Barriers to Hepatitis B Birth-Dose Vaccine in sub-Saharan Africa. GLOBAL HEALTH: SCIENCE AND PRACTICE 2022; 10:GHSP-D-21-00277. [PMID: 35294378 PMCID: PMC8885356 DOI: 10.9745/ghsp-d-21-00277] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 10/27/2021] [Indexed: 12/14/2022]
Abstract
We discuss determinants of hepatitis B birth-dose vaccine uptake in sub-Saharan Africa countries at the policy, facility, and community levels and propose solutions to known barriers of hepatitis B vaccine introduction in low- and middle-income countries. In sub-Saharan Africa (SSA), chronic viral hepatitis B (HBV) affects more than 60 million people. Mother-to-child transmission is a major contributor to the ongoing HBV epidemic and yet only 11 of 54 (20.3%) SSA countries have introduced the birth dose of HBV vaccine (HepB-BD) into their regular immunization schedule. As more African countries adopt HepB-BD, implementation approaches must be targeted to ensure effective and timely HepB-BD delivery, especially in rural and under-resourced settings. We conducted a systematic literature review of published literature using PubMed. We included 39 articles published from January 2010 to August 2020, as well as gray literature, case studies, and research performed in SSA. We describe barriers to the uptake of HepB-BD in SSA at the policy, facility, and community levels and propose solutions that are relevant to stakeholders wishing to introduce HepB-BD. We highlight the importance and challenge of reaching infants who are born outside of health care facilities (i.e., home deliveries) with HepB-BD in partnership with community health workers. We also discuss the critical role of maternal education and community engagement in future HepB-BD scale-up efforts in SSA.
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Affiliation(s)
- Alix Boisson
- Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
| | - Varun Goel
- Department of Geography, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA; Carolina Population Center, Chapel Hill, NC, USA
| | - Marcel Yotebieng
- Division of General Internal Medicine, Department of Medicine, Albert Einstein College of Medicine, Bronx, NY, USA
| | - Jonathan B Parr
- Division of Infectious Diseases, Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, NC, USA
| | - Bruce Fried
- Department of Health Policy and Management, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Peyton Thompson
- Division of Infectious Diseases, Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, NC, USA
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Sun Z, Xu J, Niu P, Jin M, Gao Q, Zhang R, Wang J, Zhang Y, Ma X. Aetiological Characteristics of Infectious Diarrhea in Yantai City, Shandong Province, China in 2017. Viruses 2022; 14:216. [PMID: 35215810 PMCID: PMC8875874 DOI: 10.3390/v14020216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/11/2022] [Accepted: 01/20/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to analyse the pathogenic spectrum and epidemiological characteristics of infectious diarrhea in Yantai City, Shandong Province, China and provide a reference for its prevention and control. A total of 713 stool specimens collected within 3 days of diarrhea onset from January to December 2017 at secondary or higher hospitals in Yantai City were tested for 10 causative pathogens, using real-time polymerase chain reaction (RT-PCR). The top two rotaviruses and norovirus were analysed for typing and geographical distribution. The total positive rate was 46.56% (332/713), and 268 of 713 specimens contained at least one pathogen; 64 had at least two pathogens, accounting for 19.28% of the positive specimens (64/332). The positivity rates of rotavirus (RV), norovirus (NoVs) GI, norovirus (NoVs) GII, enterovirus universal (EV), enteric adenoviruses (EAdV), sapovirus (SaV), astrovirus (Astv), Salmonella (SE), Listeria monocytogenes (LiMo), and Vibrio parahaemolyticus (VP) were 20.06% (143/713), 1.82% (13/713), 12.84% (89/713), 10.66% (76/713), 4.07% (29/713), 0.42% (3/713), 2.38% (17/713), 1.54% (11/713), 1.82% (13/713), and 1.54% (11/713), respectively. Infectious diarrhea showed a high prevalence in young children aged 1-5 years, accounting for 48.6% of the total number of cases. Bacterial diarrhea was predominant in summer, and viral diarrhea was distributed throughout the year, without a significant seasonal pattern. Rotavirus is dominated by G9P, accounting for 81.82%, while norovirus is dominated by the GII type and has diverse characteristics. The aetiology of infectious diarrhea in Yantai is mainly viral, with RV, NoVs, EV, EAdV, and Astv being the most frequent pathogens. Continuous surveillance of infectious diarrhea diseases can help us understand its epidemiological and pathogenic characteristics, thereby taking targeted preventive and control measures in different seasons.
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Affiliation(s)
- Zhenlu Sun
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; (Z.S.); (P.N.); (R.Z.)
- Yantai Center for Disease Control and Prevention, Yantai 264003, China; (J.X.); (Q.G.)
| | - Jinjie Xu
- Yantai Center for Disease Control and Prevention, Yantai 264003, China; (J.X.); (Q.G.)
| | - Peihua Niu
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; (Z.S.); (P.N.); (R.Z.)
| | - Miao Jin
- Department of Viral Diarrhea, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China;
| | - Qiao Gao
- Yantai Center for Disease Control and Prevention, Yantai 264003, China; (J.X.); (Q.G.)
| | - Ruiqing Zhang
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; (Z.S.); (P.N.); (R.Z.)
| | - Ji Wang
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; (Z.S.); (P.N.); (R.Z.)
- Chinese Field Epidemiology Training Program, Chinese Center for Disease Control and Prevention, Beijing 100050, China
| | - Yong Zhang
- WHO WPRO Regional Polio Reference Laboratory, NHC Key Laboratory for Biosafety, NHC Key Laboratory for Medical Virology, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Xuejun Ma
- NHC Key Laboratory of Medical Virology and Viral Diseases, National Institute for Viral Disease Control and Prevention, Chinese Center for Disease Control and Prevention, Beijing 102206, China; (Z.S.); (P.N.); (R.Z.)
- Center for Biosafety Mega-Science, Chinese Academy of Sciences, Wuhan 430071, China
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Shachakanza J, Zulu JM, Maimbolwa M. Uptake of Rotavirus Vaccine and Factors That Contributed to Its Adoption and Acceptability by Parents/Guardians in Selected Communities of Ndola, Copperbelt Province, Zambia. Health (London) 2019. [DOI: 10.4236/health.2019.114037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Shachakanza J, Zulu JM, Maimbolwa M. Incidence of Rotavirus Infection among Under-Five Children Attending Health Centres in Selected Communities of Ndola, Copperbelt Province, Zambia. Health (London) 2019. [DOI: 10.4236/health.2019.113026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Olson D, Krager S, Lamb MM, Rick AM, Asturias EJ. Knowledge of Norovirus and Attitudes toward a Potential Norovirus Vaccine in Rural Guatemala: A Cross-Sectional Exploratory Survey. Am J Trop Med Hyg 2018; 98:1498-1501. [PMID: 29582734 DOI: 10.4269/ajtmh.17-0771] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
Given limited data on norovirus vaccine acceptance, we performed an exploratory survey in a rural Guatemalan community on knowledge, interest, and willingness to pay (WTP) for a norovirus vaccine. Cluster-randomized households with children aged 6 weeks to 17 years were enrolled into one of two norovirus surveillance studies: 1) a prospective cohort (N = 207 households) and 2) two separate, community-based, cross-sectional surveys (N = 420 households). After completion of the surveillance study, vaccine surveys were completed by 564 (90%) of 627 households. Most households correctly answered questions regarding norovirus symptoms and transmission; 97% indicated interest in a hypothetical norovirus vaccine. Households with higher education had greater WTP for a vaccine (prevalence ratios = 2.2, 95% confidence interval: 1.2-3.1) and households with lower WTP were more likely to use pharmacies, the Ministry of Health, and radios for health care and information. These results suggest that a future norovirus vaccination program could be acceptable and feasible even in rural areas.
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Affiliation(s)
- Daniel Olson
- Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado.,Department of Epidemiology, Colorado School of Public Health, Aurora, Colorado.,Children's Hospital Colorado, Aurora, Colorado.,Center for Global Health, Colorado School of Public Health, Aurora, Colorado
| | - Steven Krager
- Preventive Medicine Residency Program, Colorado School of Public Health, Aurora, Colorado
| | - Molly M Lamb
- Department of Epidemiology, Colorado School of Public Health, Aurora, Colorado.,Center for Global Health, Colorado School of Public Health, Aurora, Colorado
| | - Anne-Marie Rick
- Children's Hospital Colorado, Aurora, Colorado.,Center for Global Health, Colorado School of Public Health, Aurora, Colorado.,Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado
| | - Edwin J Asturias
- Department of Epidemiology, Colorado School of Public Health, Aurora, Colorado.,Department of Pediatrics, University of Colorado School of Medicine, Aurora, Colorado.,Center for Global Health, Colorado School of Public Health, Aurora, Colorado.,Children's Hospital Colorado, Aurora, Colorado
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8
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Zivich PN, Kiketa L, Kawende B, Lapika B, Yotebieng M. Vaccination Coverage and Timelines Among Children 0-6 Months in Kinshasa, the Democratic Republic of Congo: A Prospective Cohort Study. Matern Child Health J 2017; 21:1055-1064. [PMID: 28058663 DOI: 10.1007/s10995-016-2201-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Objectives The Democratic Republic of Congo (DR Congo) is one of the ten countries, which accounts for 60% of unvaccinated children worldwide. The aim of this study was to assess predictors of incomplete and untimely immunization among a cohort of infants recruited at birth and followed up through 24 weeks in Kinshasa. Methods Complete immunization for each vaccine was defined as receiving all the recommended doses. Untimely immunization was defined as receiving the given dose before (early) or after (delayed) the recommended time window. Infants not immunized by the end of the follow-up time were considered missing. Multivariate hierarchical model and generalized logistic model were used to assess the independent contribution of each socio-economic and demographic factors considered to complete immunization and timeliness, respectively. Results Overall, of 975 infants from six selected clinics included in the analysis 84.7% were fully immunized the three doses of DTP or four doses of Polio by 24 weeks of age. Independently of the vaccine considered, the strongest predictor of incomplete and untimely immunization was the clinic in which the infant was enrolled. This association was strengthened after adjustment for socio-economic and demographic characteristics. Education and the socio-economic status also were predictive of completion and timeliness of immunization in our cohort. Discussion In conclusion, the strongest predictor for incomplete and untimely immunization among infants in Kinshasa was the clinics in which they were enrolled. The association was likely due to the user fee for well-baby clinic visits and its varying structure by clinic.
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Affiliation(s)
- Paul N Zivich
- Division of Epidemiology, College of Public Health, The Ohio State University, Cunz Hall 1841 Neil Avenue, Columbus, OH, 43210, USA.
| | - Landry Kiketa
- School of Public Health, The University of Kinshasa, 11850, Kinshasa, Democratic Republic of Congo
| | - Bienvenu Kawende
- School of Public Health, The University of Kinshasa, 11850, Kinshasa, Democratic Republic of Congo
| | - Bruno Lapika
- Department of Anthropology, The University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Marcel Yotebieng
- Division of Epidemiology, College of Public Health, The Ohio State University, Cunz Hall 1841 Neil Avenue, Columbus, OH, 43210, USA
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Scobie HM, Phares CR, Wannemuehler KA, Nyangoma E, Taylor EM, Fulton A, Wongjindanon N, Aung NR, Travers P, Date K. Use of Oral Cholera Vaccine and Knowledge, Attitudes, and Practices Regarding Safe Water, Sanitation and Hygiene in a Long-Standing Refugee Camp, Thailand, 2012-2014. PLoS Negl Trop Dis 2016; 10:e0005210. [PMID: 27992609 PMCID: PMC5167226 DOI: 10.1371/journal.pntd.0005210] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 11/25/2016] [Indexed: 12/05/2022] Open
Abstract
Oral cholera vaccines (OCVs) are relatively new public health interventions, and limited data exist on the potential impact of OCV use on traditional cholera prevention and control measures—safe water, sanitation and hygiene (WaSH). To assess OCV acceptability and knowledge, attitudes, and practices (KAPs) regarding cholera and WaSH, we conducted cross-sectional surveys, 1 month before (baseline) and 3 and 12 months after (first and second follow-up) a preemptive OCV campaign in Maela, a long-standing refugee camp on the Thailand-Burma border. We randomly selected households for the surveys, and administered questionnaires to female heads of households. In total, 271 (77%), 187 (81%), and 199 (85%) households were included in the baseline, first and second follow-up surveys, respectively. Anticipated OCV acceptability was 97% at baseline, and 91% and 85% of household members were reported to have received 1 and 2 OCV doses at first follow-up. Compared with baseline, statistically significant differences (95% Wald confidence interval not overlapping zero) were noted at first and second follow-up among the proportions of respondents who correctly identified two or more means of cholera prevention (62% versus 78% and 80%), reported boiling or treating drinking water (19% versus 44% and 69%), and washing hands with soap (66% versus 77% and 85%); a significant difference was also observed in the proportion of households with soap available at handwashing areas (84% versus 90% and 95%), consistent with reported behaviors. No significant difference was noted in the proportion of households testing positive for Escherichia coli in stored household drinking water at second follow-up (39% versus 49% and 34%). Overall, we observed some positive, and no negative changes in cholera- and WaSH-related KAPs after an OCV campaign in Maela refugee camp. OCV campaigns may provide opportunities to reinforce beneficial WaSH-related KAPs for comprehensive cholera prevention and control. Safe water, sanitation, and hygiene (WaSH) are the primary measures for cholera prevention and control. Since 2010, oral cholera vaccines (OCVs) have been recommended as an additional tool for endemic and epidemic cholera prevention and control. Given the relatively new use of OCVs in public health programs, there is limited information on the impact of OCV use on traditional WaSH activities, i.e., can they serve as complementary tools, or will OCV use have a negative impact on WaSH-related behaviors? This study reports the findings of knowledge, attitudes and practices (KAP) surveys conducted before and after a preventive OCV campaign (2013) in a long-standing refugee camp in Thailand, where frequent cholera outbreaks had occurred in recent years. The surveys demonstrated high acceptability of the OCV campaign and several modest improvements in cholera and WaSH KAPs among the camp population. OCV campaigns may be used as opportunities to reinforce cholera and WaSH-related messaging towards strengthening comprehensive cholera prevention and control.
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Affiliation(s)
- Heather M. Scobie
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- * E-mail:
| | - Christina R. Phares
- Thailand Ministry of Public Health – U.S. Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
- Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Kathleen A. Wannemuehler
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Edith Nyangoma
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Eboni M. Taylor
- Epidemic Intelligence Service, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
- Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Anna Fulton
- Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
| | - Nuttapong Wongjindanon
- Thailand Ministry of Public Health – U.S. Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
| | - Naw Rody Aung
- Première Urgence-Aide Médicale Internationale, Mae Sot, Thailand
| | - Phillipe Travers
- Première Urgence-Aide Médicale Internationale, Mae Sot, Thailand
| | - Kashmira Date
- Global Immunization Division, Centers for Disease Control and Prevention, Atlanta, Georgia, United States of America
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