Question

cumulative exam
cumulative exam complete
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what makes up a vaccine?
red blood cells
white blood cells
a weakened or dead form of a pathogen
a preparation of synthetic dietary supplements

Explanation:

Vaccines are designed to stimulate the immune system. Red blood cells carry oxygen, white blood cells are part of the immune system but not what vaccines are made of. Synthetic dietary supplements are not related to vaccines. A weakened or dead pathogen in a vaccine helps the body recognize and fight the actual pathogen later.

Answer:

a weakened or dead form of a pathogen