vaccine

What Are the Different Types of Vaccines?

There are several types of vaccines, including:
Live attenuated vaccines: Contain a weakened form of the germ that causes a disease.
Inactivated vaccines: Contain a killed version of the germ.
Subunit, recombinant, polysaccharide, and conjugate vaccines: Use specific pieces of the germ.
Toxoid vaccines: Contain a toxin made by the germ that causes a disease.
mRNA vaccines: Use messenger RNA to instruct cells to produce a protein that triggers an immune response.
Viral vector vaccines: Use a modified version of a different virus to deliver instructions to cells to produce an immune response.

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