The oral vaccine contains a weakened polio virus intended to stimulate immunity without causing the disease.
(The oral vaccine; contains; a weakened polio virus intended to stimulate immunity without causing the disease) (a weakened polio virus; intended; to stimulate immunity without causing the disease) (a weakened polio virus; to stimulate; immunity)
The oral vaccine a weakened polio virus a weakened polio virus
contains intended to stimulate
a weakened polio virus intended to stimulate immunity without causing the disease
to stimulate immunity without causing the disease
immunity