Other vaccines, such as Sabin's polio vaccine and the first tuberculosis vaccine, contained live viruses that could win out over the immune system and cause fatal infections.
(Other vaccines, such as Sabin's polio vaccine and the first tuberculosis vaccine; contained; live viruses that could win out over the immune system and cause fatal infections) (live viruses; could win out; L:over the immune system) (live viruses; cause; fatal infections)
Other vaccines, such as Sabin's polio vaccine and the first tuberculosis vaccine live viruses live viruses
contained could win out cause
live viruses that could win out over the immune system and cause fatal infections
L:over the immune system
fatal infections