Definitions for "Passive immunity"
Immunity acquired by transfer of antibodies or T-lymphocytes from another individual.
The immunity that a baby has to certain diseases due to the antibodies transferred to him or her through the mother's breast milk.
Protection against disease by a human (or animal) antibody preparation (immunoglobulin). Protection is generally limited and wanes over time. Passive immunity is also conferred by maternal antibodies passing to the fetus before birth.