Explain how vaccination protects a child against a viral disease.

Explanation:

It doesn’t is actually makes u sick sometimes but if u agree then vaccinations mean when only a bit of the pathogen is ingested into to u for ur body to become immune and so if u get the disease yours body has already made antibodies which contain a special format in which they break down the pathogen faster.and the pathogen will be broken down quickly as the process is faster when your body already contains the code against it.