A vaccine is a preparation of killed or weakened bacteria or viruses that, when introduced into the body, stimulates the production of antibodies against the antigens it contains.
(A vaccine; is; a preparation of killed or weakened bacteria or viruses that, when introduced into the body, stimulates the production of antibodies against the antigens) (the antigens; contains; it) (a preparation of killed or weakened bacteria or viruses; stimulates; the production of antibodies against the antigens; T:when introduced into the body)
A vaccine the antigens a preparation of killed or weakened bacteria or viruses
is contains stimulates
a preparation of killed or weakened bacteria or viruses that, when introduced into the body, stimulates the production of antibodies against the antigens
it
the production of antibodies against the antigens T:when introduced into the body