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A. Chard · SciRah

Researcher profile · Semantic Scholar

A. Chard

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A. Chard — researcher profile on SciRah

h-index: 19
Works: 45
Citations: 1,332

Most-cited papers

Vaccine Effectiveness of JYNNEOS against Mpox Disease in the United States
Nicholas P. Deputy, Joseph Deckert, A. Chard, Neil C. Sandberg +11 more
2023New England Journal of Medicine231 citations Open access
Semantic Scholar
Estimated Effectiveness of JYNNEOS Vaccine in Preventing Mpox: A Multijurisdictional Case-Control Study — United States, August 19, 2022–March 31, 2023
Alexandra F. Dalton, A. Diallo, A. Chard, Danielle L. Moulia +82 more
2023MMWR. Morbidity and mortality weekly report157 citations Open access
Semantic Scholar
Intimate Partner Violence and Social Pressure among Gay Men in Six Countries
C. Finneran, A. Chard, C. Sineath, P. Sullivan +1 more
2012Western Journal of Emergency Medicine86 citations Open access
Semantic Scholar
Routine Vaccination Coverage — Worldwide, 2019
A. Chard, M. Gacic-Dobo, M. Diallo, S. Sodha +1 more
2000MMWR. Morbidity and mortality weekly report86 citations Open access
Semantic Scholar
Associations between school- and household-level water, sanitation and hygiene conditions and soil-transmitted helminth infection among Kenyan school children
Matthew C Freeman, A. Chard, B. Nikolay, J. Garn +6 more
2015Parasites & Vectors76 citations Open access
Semantic Scholar
Progress Toward Polio Eradication — Worldwide, January 2018–March 2020
A. Chard, S. Datta, G. Tallis, C. Burns +3 more
2020MMWR. Morbidity and mortality weekly report75 citations Open access
Semantic Scholar
Impact of a school-based water, sanitation, and hygiene intervention on school absence, diarrhea, respiratory infection, and soil-transmitted helminths: results from the WASH HELPS cluster-randomized trial
A. Chard, J. Garn, Howard H. Chang, T. Clasen +1 more
2019Journal of Global Health68 citations Open access
Semantic Scholar
Experiences of homophobia among gay and bisexual men: results from a cross-sectional study in seven countries
A. Chard, C. Finneran, P. Sullivan, R. Stephenson
2015Culture, Health and Sexuality63 citations Open access
Semantic Scholar
Design, Intervention Fidelity, and Behavioral Outcomes of a School-Based Water, Sanitation, and Hygiene Cluster-Randomized Trial in Laos
A. Chard, M. Freeman
2018International Journal of Environmental Research and Public Health45 citations Open access
Semantic Scholar
The impact of water consumption on hydration and cognition among schoolchildren: Methods and results from a crossover trial in rural Mali
A. Chard, Victoria Trinies, C. Edmonds, Assitan Sogore +1 more
2019PLoS ONE36 citations Open access
Semantic Scholar
The impact of school water, sanitation, and hygiene improvements on infectious disease using serum antibody detection
A. Chard, Victoria Trinies, D. Moss, Howard H. Chang +3 more
2018PLoS Neglected Tropical Diseases35 citations Open access
Semantic Scholar
Evaluation of Immunoglobulin G Responses to Plasmodium falciparum and Plasmodium vivax in Malian School Children Using Multiplex Bead Assay.
E. Rogier, D. Moss, A. Chard, Victoria Trinies +3 more
2017American Journal of Tropical Medicine and Hygiene35 citations Open access
Semantic Scholar
Effects of Water Provision and Hydration on Cognitive Function among Primary-School Pupils in Zambia: A Randomized Trial
Victoria Trinies, A. Chard, Tommy Mateo, M. Freeman
2016PLoS ONE35 citations Open access
Semantic Scholar
Costs and cost-effectiveness of influenza illness and vaccination in low- and middle-income countries: A systematic review from 2012 to 2022
R. Gharpure, A. Chard, Maria A. Cabrera-Escobar, Wei-Gong Zhou +6 more
2024PLoS Medicine33 citations Open access
Semantic Scholar
Perceptions of HIV Seriousness, Risk, and Threat Among Online Samples of HIV-Negative Men Who Have Sex With Men in Seven Countries
A. Chard, N. Metheny, R. Stephenson
2017JMIR Public Health and Surveillance30 citations Open access
Semantic Scholar
Associations between soil-transmitted helminthiasis and viral, bacterial, and protozoal enteroinfections: a cross-sectional study in rural Laos
A. Chard, Kelly K Baker, K. Tsai, K. Levy +3 more
2019Parasites & Vectors27 citations Open access
Semantic Scholar
Willingness to use couples voluntary counseling and testing services among men who have sex with men in seven countries
R. Stephenson, A. Chard, C. Finneran, P. Sullivan
2013AIDS Care27 citations Open access
Semantic Scholar
Social Stressors and Intoxicated Sex Among an Online Sample of Men who have Sex with Men (MSM) Drawn from Seven Countries
A. Chard, N. Metheny, P. Sullivan, R. Stephenson
2018Substance Use & Misuse23 citations
Semantic Scholar
Comparing Sanitation Delivery Modalities in Urban Informal Settlement Schools: A Randomized Trial in Nairobi, Kenya
Kate Bohnert, A. Chard, A. Mwaki, A. Kirby +4 more
2016International Journal of Environmental Research and Public Health20 citations Open access
Semantic Scholar
Influenza Incidence and Vaccine Effectiveness During the Southern Hemisphere Influenza Season — Chile, 2022
María Fernanda Olivares Barraza, R. Fasce, Francisco Nogareda, P. Marcenac +11 more
2022MMWR. Morbidity and mortality weekly report18 citations Open access
Semantic Scholar
Spatiotemporal variation in risk of Shigella infection in childhood: a global risk mapping and prediction model using individual participant data
H. Badr, J. Colston, Nhat-Lan H. Nguyen, Yenting Chen +56 more
2023Lancet Global Health16 citations Open access
Semantic Scholar
Environmental and spatial determinants of enteric pathogen infection in rural Lao People’s Democratic Republic: A cross-sectional study
A. Chard, K. Levy, Kelly K Baker, K. Tsai +4 more
2020PLoS Neglected Tropical Diseases14 citations Open access
Semantic Scholar
Use of Stay-at-Home Orders and Mask Mandates to Control COVID-19 Transmission — Blackfeet Tribal Reservation, Montana, June–December 2020
Caroline Pratt, A. Chard, Rosaula LaPine, K. Galbreath +6 more
2021MMWR. Morbidity and mortality weekly report13 citations Open access
Semantic Scholar
Salmonella Illness Outbreaks Attributed to Chicken by Product Type, United States, 1998-2022.
A. Chard, Taylor Eisenstein, Andrea Cote, Selena Kremer-Caldwell
2025Journal of Food Protection10 citations Open access
Semantic Scholar
Detection of Immunoglobulin G Antibodies to Taenia solium Cysticercosis Antigen Glutathione-S-Transferase-rT24H in Malian Children Using Multiplex Bead Assay.
D. Moss, S. Handali, A. Chard, Victoria Trinies +5 more
2018American Journal of Tropical Medicine and Hygiene8 citations Open access
Semantic Scholar
Associations between school- and household-level water, sanitation and hygiene conditions and soil-transmitted helminth infection among Kenyan school children
M. C. Freeman, A. Chard, B. Nikolay, J. Garn +6 more
2015Parasites & Vectors8 citations Open access
Semantic Scholar
Interim Effectiveness Estimates of 2025 Southern Hemisphere Influenza Vaccines in Preventing Influenza-Associated Outpatient and Hospitalized Illness — Eight Southern Hemisphere Countries, March–September 2025
Savanah Russ, Francisco Nogareda, Annette K Regan, Estefanía Benedetti +32 more
2025MMWR. Morbidity and mortality weekly report7 citations
Semantic Scholar
Serological Responses to Filarial Antigens in Malian Children Attending Elementary Schools.
D. Moss, A. Chard, Victoria Trinies, S. Doumbia +2 more
2017American Journal of Tropical Medicine and Hygiene7 citations Open access
Semantic Scholar
High SARS-CoV-2 Seroprevalence and Rapid Neutralizing Antibody Decline among Agricultural Workers in Rural Guatemala, June 2020–March 2021
Chelsea Iwamoto, Kelsey E Lesteberg, Molly M. Lamb, D. Calvimontes +20 more
2022Vaccines6 citations Open access
Semantic Scholar
Clinical and Economic Impact of COVID-19 on Agricultural Workers, Guatemala
D. Olson, D. Calvimontes, Molly M. Lamb, Gerber Guzman +24 more
2022Emerging Infectious Diseases6 citations Open access
Semantic Scholar
Estimating averted illnesses from influenza vaccination for children and pregnant women – El Salvador, Panama, and Peru, 2011–2018
A. Chard, Chiedza Machingaidze, Sergio Loayza, R. Gharpure +13 more
2024Vaccine5 citations Open access
Semantic Scholar
End-of-season influenza vaccine effectiveness during the Southern Hemisphere 2022 influenza season – Chile, Paraguay, and Uruguay
A. Chard, Francisco Nogareda, Annette K. Regan, María Fernanda Olivares Barraza +18 more
2023International Journal of Infectious Diseases5 citations Open access
Semantic Scholar
Risk of Clade II Mpox Associated with Intimate and Nonintimate Close Contact Among Men Who Have Sex with Men and Transgender Adults — United States, August 2022–July 2023
A. Chard, Alexandra F. Dalton, A. Diallo, Danielle L. Moulia +27 more
2024MMWR. Morbidity and mortality weekly report4 citations Open access
Semantic Scholar
Clinical and Economic Impact of COVID-19 on Plantation Workers: Preliminary Results from the Guatemala Agricultural Workers and Respiratory Illness Impact (AGRI) Study
D. Olson, D. Calvimontes, Molly M. Lamb, Gerber Guzman +24 more
2022medRxiv4 citations Open access
Semantic Scholar
Estimation of oral poliovirus vaccine effectiveness in Afghanistan, 2010–2020
A. Chard, Maureen Martinez, Almea M. Matanock, A. Kassem
2021Vaccine3 citations Open access
Semantic Scholar
Adverse Early Life Experiences as a Social Determinant of Mental Health
Carol Koplan, A. Chard
20143 citations
Semantic Scholar
Foodborne Disease Outbreaks Associated with Marine Toxins — Foodborne Disease Outbreak Surveillance System, United States, 2011–2023
Cassie M Hartley, Son-Ho T. Ang, Virginia A. Roberts, A. Chard
2026Morbidity and mortality weekly report. Surveillance summaries2 citations Open access
Semantic Scholar
Influenza Vaccine-Averted Illness in Chile, Guyana, and Paraguay During 2013–2018: A Standardized Approach to Assess the Value of Vaccination
Jorge H. Jara, Sergio Loayza, Francisco Nogareda, Paula Couto +21 more
2025Journal of Infectious Diseases2 citations Open access
Semantic Scholar
Progress towards polio eradication - worldwide, January 2018-March 2020
A. Chard, D. Datta, G. Tallis, C. Burns +3 more
20202 citations
Semantic Scholar
Northern Hemisphere 2025/26 influenza vaccine effectiveness during months with influenza A(H3N2) subclade K predominance— Suzhou, Eastern China
Peng-Wei Cui, Sui-Zan Zhou, A. Chard, Junrong Wang +15 more
2026International Journal of Infectious Diseases1 citations Open access
Semantic Scholar
SARS-CoV-2 secondary attack rates and risks for transmission among agricultural workers and their households in Guatemala, 2022-2023
Joseph Daniel Carreon, Molly M. Lamb, A. Chard, D. Calvimontes +23 more
2025IJID Regions1 citations
Semantic Scholar
Validity of influenza vaccine effectiveness calculations using a test-negative design in Thailand
Erica E. Zeno, P. Praphasiri, Wichan Bhunyakitikorn, S. Nakphook +12 more
2026American Journal of Epidemiology0 citations Open access
Semantic Scholar
COVID-19 Attitudes and Vaccine Hesitancy among an Agricultural Community in Southwest Guatemala: A Cross-Sectional Survey
N. Rojop, D. Calvimontes, Edgar Barrios, Molly M. Lamb +15 more
2023Vaccines0 citations Open access
Semantic Scholar
1039. Clinical and Economic Impact of COVID-19 and Serologic Protection among Farm Workers: Results from the Guatemala Agricultural Workers and Respiratory Illness Impact (AGRI) Study
D. Olson, D. Calvimontes, Molly M. Lamb, Kelsey E Lesteberg +17 more
2022Open Forum Infectious Diseases0 citations Open access
Semantic Scholar
Influenza incidence and vaccine effectiveness during the Southern Hemisphere Influenza season—Chile, 2022
María Fernanda Olivares Barraza, R. Fasce, Francisco Nogareda, P. Marcenac +11 more
2022American Journal of Transplantation0 citations Open access
Semantic Scholar

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