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How do vaccines give immunity to infectious diseases?
A. They kill pathogenic microbes.
B. They produce an immune response.
C. They contain antibodies against pathogens.
D. They inhibit the antigen-antibody reaction.


Sagot :

B. They produce an immune response.
Vaccines protect you by preparing your immune system to recognize and fight serious, and sometimes deadly, diseases. A vaccine contains a specific part of a germ (bacteria or virus), called an antigen. The antigen is killed or disabled before it's used to make the vaccine, so it can't make you sick.