Protective efficacy of a monovalent oral type 1 poliovirus vaccine: a case-control study
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N. Grassly | D. Heymann | R. Sutter | U. Griffiths | J. Deshpande | S. Durrani | S. Bahl | J. Wenger | R. Aylward | P. Fine | P. Francis | Nicholas C. Grossly | Sunita Durrani