Gaurav Kwatra, PhD, MPH

Seroprevalence of hepatitis E virus infection among pregnant women in South Africa at time of delivery. Fotso, CB; Dhar, N; Madhi, SA; Kwatra, G. Infectious Diseases Now. 2026; 105336.

Efficacy of WRSs2, a live-attenuated Shigella sonnei vaccine, against shigellosis in a controlled human infection model in the USA: a phase 2, double-blind, randomised, placebo-controlled trial. Rouphael, N; Baqar, S; Dickey, M; Quigley, C; Pham, T; Adams, J; Kwatra, G; Bechnak, S; Smith, V; Scherer, EM; Porter, CK; Suvarnapunya, AE; Venkatesan, MM; Frenck, RW. The Lancet Infectious Diseases. 2026.

Rethinking measles vaccination timing in infants: closing the immunity gap. Dhar, N; Spearman, P; Kwatra, G. Future Virology. 2026; 21(6):373-375.

Prevalence of group B Streptococcus colonization in pregnant women and serotype specific immunity among mother-newborns dyads in Ghana and Zimbabwe. Adjei, IA; Mupambireyi, Z; White, SA; Matsikire, E; Manu, A; Dhar, N; Iddrisu, L; Mathai, E; Newton, S; Cuevas, L; Mathai, M; Cowan, F; Asante, KP; Kwatra, G. Vaccine. 2026; 82:128626.

Waning of measles immunity by 5 years of age following an accelerated two-dose measles vaccine schedule at 6 and 12 months in South African children: an observational cohort study. Kapelus, DJ; Ranchod, H; Olwagen, CP; Koen, A; Mutsaerts, EAML; Jose, L; Kwatra, G; Madhi, SA. Vaccine. 2026; 81:128580.

Human Nutrition and Oral Vaccine Efficacy. Kwatra, G; Klein, JI; Moore, SR. Annual Review of Nutrition. 2026.

Genomic Characterization of Klebsiella pneumoniae Causing Invasive Disease in South African Infants: Observational Studies Between 2018 and 2023. Olwagen, CP; Izu, A; Khan, S; Jones, S; Briner, C; Kwatra, G; Van Der Merwe, L; Dean, NJ; Baillie, VL; Mahtab, S; Donald, RGK; Simon, R; Dangor, Z; Madhi, SA. Open Forum Infectious Diseases. 2026; 13(1):ofag004.

Higher serum zinc micronutrient levels are associated with reduced susceptibility to Group B Streptococcus rectovaginal colonisation in pregnant women. Dhar, N; Gaddy, J; Aronoff, DM; Channa, K; Madhi, SA; Kwatra, G. PLoS ONE. 2026; 21(3):e0344689.

Prevalence and associated factors of methicillin-resistant and vancomycin-susceptible Staphylococcus aureus among clinical isolates at Hawassa university comprehensive specialized hospital, Ethiopia, 2019-2023. Tsige, I; Reda, DY; Kefeni, M; Merid, Y; Negash, AA; Kwatra, G; Balcha, ES; Ali, MM. BMC Infectious Diseases. 2025; 25(1):1388.

Prevalence of hepatitis B virus infection among pregnant women and cord blood hepatitis B surface antigen positive newborns in sub-Saharan Africa and South Asia. Bokop, C; Dhar, N; Izu, A; Thaver-Kleitman, J; Prabdial-Sing, N; Ali, MM; Akaba, G; Barsosio, HC; Berkley, JA; Beck, MM; Tapia, MD; Veeraraghavan, B; Kwatra, G; Madhi, SA. Journal of Clinical Virology. 2025; 179:105826.