Vaccination is a process of injecting a dead or weakened form of a germ into the body. how does this strengthen the immune system? it allows the body to increase its internal temperature. it allows the body to regulate the inflammation response. it allows the body to keep germ information for future infections. it allows the body to increase its desire to eat healthy food.

Hey there! :D

When you get a vaccination, it is a way for your body to save information on the germ/pathogen. It helps the body prepare for a bigger threat to your body! It saves the information that getting rid of the weakened/dead germ does, and uses it so your immune system knows how to get rid of it later. 

The best answer is:

"It allows the body to keep germ information for future infections."

I hope this helps!
~kaikers