Injection of a weakened or mild form of a pathogen to produce immunity is known as what?

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Multiple Choice

Injection of a weakened or mild form of a pathogen to produce immunity is known as what?

Explanation:
Vaccination is the process of exposing the immune system to a weakened or inactivated form of a pathogen (or a piece of it) so the adaptive immune response can learn to recognize it. This doesn't usually cause disease, but it trains B and T cells to remember the pathogen. If later you encounter the real microbe, these memory cells mount a faster, stronger response, preventing illness or reducing its severity. Inoculation is a broader old term for introducing something into the body; immunization refers to becoming immune as a result of vaccination or prior infection; allergy is an inappropriate immune reaction to harmless substances.

Vaccination is the process of exposing the immune system to a weakened or inactivated form of a pathogen (or a piece of it) so the adaptive immune response can learn to recognize it. This doesn't usually cause disease, but it trains B and T cells to remember the pathogen. If later you encounter the real microbe, these memory cells mount a faster, stronger response, preventing illness or reducing its severity. Inoculation is a broader old term for introducing something into the body; immunization refers to becoming immune as a result of vaccination or prior infection; allergy is an inappropriate immune reaction to harmless substances.

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