What sort of testing goes on before and after a vaccine is given to a child? [1:46]

What sort of testing goes on before and after a vaccine is given to a child? [1:46]
What sort of testing goes on before and after a vaccine is given to a child? [1:46]
What sort of testing goes on before and after a vaccine is given to a child? [1:46]

vaccine,vaccine safety,vaccine testing,childhood vacicnes,fda,clinical trials,vaccine side effects,monitoring vaccine safety,VAERS,CISA,VSD,