From the Malawi–Liverpool–Wellcome Program (P.D.P., P.P., J.E.M., T.M., F.M., C.M., H.M., D.B., M.M., M.H., M.G., M.A.G.), the Blantyre Malaria Project (N.N., O.M.N.), the Department of Paediatrics, Queen Elizabeth Central Hospital (Q.D.), the District Health Office, Blantyre District Council (G.K.), and Kamuzu University of Health Sciences (M.A.G.) — all in Blantyre, Malawi; the Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore (Y.L., J.K.T., F.A., K... (At 2021-09-16)