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The persistance of immunity several years after primary immunization with live oral poliovirus vaccine Sabin
(Unija bioloških naučnih društava Jugoslavije, Beograd, 1972)
Both humoral immunity and intestinal resistance in a group of children were followed 2 to 6 yr after primary immunization in Ivanjica, a small community in Serbia. A significant decrease in antibody titers was found for ...