Immune predictors of oral poliovirus vaccine immunogenicity among infants in South India by Babji, S, Manickavasagam, P, Chen, Y-H, Jeyavelu, N, Jose, NV, Praharaj, I, Syed, C, Kaliappan, SP, John, J, Giri, S, Venugopal, S, Kampmann, B, Parker, EPK, Iturriza-Gómara, M, Kang, G, Grassly, NC, Uhlig, HU