Question

how does a vaccine provide immunity against a disease
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Answer 1

Vaccine contains the half-dead cells of the given particular disease causing microbes which are let into the human body causing no harm . It makes the human immune system to make antibodies against it to fight the disease in any future circumstances.................................

Answer 2

A vaccine provides immunity by the following process:

Explanation:

• A vaccine contains dead or weakened pathogens which can cause an infectious disease in a person.

• When these pathogens are injected into the body of a person, the immune system of the body develops immunity for that pathogen.

• Next time, when the pathogen naturally infects the body, then the immune cells easily recognize the pathogens and a faster immune response is produced against the disease.