The correct answer is: A. A vaccination is an example of the introduction of passive immunity into the body.
Active immunity is the body’s own immune system’s response to an infection or vaccination. This type of immunity is long-lasting and can be boosted by repeated exposure to the same antigen.
Passive immunity is the temporary transfer of antibodies from one person to another. This type of immunity is short-lived and does not provide the same level of protection as active immunity.
Vaccination is an example of the introduction of passive immunity into the body. When a person is vaccinated, they are given a small amount of
a weakened or inactivated form of the virus or bacteria that they are being vaccinated against. This exposure allows the body’s immune system to produce antibodies against the virus or bacteria, without the person actually getting sick.Active and passive humoral immunity are both mechanisms of adaptive immunity that use antibodies. However, active immunity is the body’s own immune system’s response to an infection or vaccination, while passive immunity is the temporary transfer of antibodies from one person to another.
Immunological memory is not established by passive immunization. Immunological memory is the ability of the immune system to remember an infection or vaccination and produce a faster and stronger response if the same infection or vaccination is encountered again in the future. This type of memory is only developed through active immunity.
The antibodies utilized in active immunity are not acquired from another organism. The body’s own immune system produces the antibodies in response to an infection or vaccination.