IMMUNOLOGY

Detailed explanation-1: -Passive immunity is naturally transferred to breast fed babies from their mother’s milk. Breast milk has colostrum that contains antibodies against pathogens the mother has been exposed to. Transfer of antibodies that occurs from mother to foetus via the placenta is also an example here.

Detailed explanation-2: -Passive immunity can occur naturally, such as when an infant receives a mother’s antibodies through the placenta or breast milk, or artificially, such as when a person receives antibodies in the form of an injection (gamma globulin injection).

Detailed explanation-3: -Immunity acquired by a baby through breastfeeding is passive acquired immunity, as already formed antibodies in the mother’s body are transferred to the baby through breast milk.