noun
: immunity taken on by a member of a naturally susceptible group (as following an attack of some diseases or as induced by injection of suitable antigens or antibodies) — compare active immunity , natural immunity
noun
: immunity taken on by a member of a naturally susceptible group (as following an attack of some diseases or as induced by injection of suitable antigens or antibodies) — compare active immunity , natural immunity
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012