Which of these is true about vaccines?
A
They prevent viruses from replicating once you are infected.
B
They are not effective at giving people immunity against a virus.
C
They cause the body to produce antibodies against a specific virus.
D
They cause the body to become actively infected with a mild form of a specific virus.

A. C, and D

Explanation:

A: it inserts that type of virus into your body so your immune system learns how to defend your body from it.

C: Your body produces some type of small organism cell or whatever it is to work and fight against that specific virus.

D: Yes, the vaccine is basically the virus but a test so your body learns how to fight it.

it would be heredity