Explain passive and active immunity.

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Passive immunity

When a person is administered with antibodies to provide temporary protection against pathogens, it is said to be passive immunity.
It is short lasting immunity.
Passive immunity can be natural or artificial. Natural passive immunity includes antibodies from mother to child by breatfeeding. Artificially acquired passive immunity includes vaccination ( Injection of antibodies)
Passive immunity prodives immediate protection against disease.

Active immunity

When body produces antibodies in response to presence of foreign antigens, it is said to be active immunity.
It is long lasting.
Active immunity can be natural or artificial. Natural active immunity includes production of antibodies by the body after detection of pathogens. Artificially acquired active immunity includes vaccination ( Injection of antigens that stimulate the immune system to produce antibodies). Vaccines include inactivated toxins, killed microbes.
Active immunity has slower response but memory cells recognize the antigens and can provide immunity in times of second attack.

Sydney Mullin answered 1 year ago

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