Question

Which of the following is an example of passive immunity?

• A. Transfer of antibodies from mother to fetus via the placenta
• B. Transfer of antibodies via colostrum in breast fed babies
• C. Administer antitoxin in case of snake bite
• D. All of the above

Answer 1

The correct option is D

All of the above

Passive immunity is generated wherein the antibody is generated in some other person and these antibodies are in turn transferred to another individual. This confers the recipient with immunity to a disease that the person did not experience. 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.Other applications are in case of snake bites or other poisoning where the immunity has to be conferred immediately.