ANATOMY

Detailed explanation-1: -Active immunity can be acquired through natural immunity or vaccine-induced immunity. Natural immunity is acquired from exposure to the disease organism through infection with the actual disease.

Detailed explanation-2: -Naturally acquired active immunity occurs after an infection activates the person’s immune system. For example, non-immunized children who develop measles and recover from the illness, get better because they have made an effective immune response against the measles virus.

Detailed explanation-3: -Our body starts producing antibodies to engulf the pathogen and destroy its antigen. When it encounters for the first time, it is called a primary response. Once a body gets used to these pathogens, antibodies are ready to attack them for the second time and are known as naturally acquired immunity.

Detailed explanation-4: -Acquired immunity is pathogen-specific. This means that if a person has developed immunity against the Rubella (German measles) virus, it does not automatically mean that the person is also protected against the polio virus. And the immune system remembers each and every immunological encounter in our body.

Detailed explanation-5: -a vaccine. exposure to an infection or disease. another person’s antibodies (infection-fighting immune cells) 09-Dec-2019