IMMUNOLOGY

Detailed explanation-1: -Natural immunity is acquired from exposure to the disease organism through infection with the actual disease. Vaccine-induced immunity is acquired through the introduction of a killed or weakened form of the disease organism through vaccination.

Detailed explanation-2: -Active immunity is usually classified as natural or acquired. Wild infection for example with hepatitis A virus (HAV) and subsequent recovery gives rise to a natural active immune response usually leading to lifelong protection.

Detailed explanation-3: -What is an example of active and passive immunity? An example of active immunity is through vaccinations, and passive immunity is through the placenta.

Detailed explanation-4: -A type of immunity that occurs when a person is given antibodies rather than making them through his or her own immune system. For example, passive immunity occurs when a baby receives a mother’s antibodies through the placenta or breast milk.