Antibody-mediated immunity passed on to a fetus or child by its mother is known as maternal passive immunity, which is a type of naturally acquired passive immunity. Passive immunity, on the other hand, is acquired protection against infection by the transfer of antibodies to a vulnerable individual. Passive immunity is distinguished from active immunity by the immune system's response to a pathogen or a vaccine. Therefore, a newborn's immunity from the mother's milk is passive immunity that the body naturally acquired over time.