The older animal-based vaccine contained live virus, causing 204 people to contract polio, and eleven documented deaths.
(The older animal-based vaccine; contained; live virus) Context(The older animal - based vaccine contained,List([0, 40))):(The older animal-based vaccine; contained live virus causing; 204 people to contract polio) Context(The older animal - based vaccine contained causing,List([0, 60))):(204 people; to contract; polio)
The older animal - based vaccine contained,List([0, 40)) The older animal - based vaccine contained causing,List([0, 60))
The older animal-based vaccine The older animal-based vaccine 204 people
contained contained live virus causing to contract
live virus
204 people to contract polio
polio