... tell anyone that. In fact, it's easy to forget. There's no vaccine for it, I don't believe, because we keep learning it, as read more...
... stations donated to University of Nebraska in 1954. • Polio vaccine developed by Dr. Jonas E. Salk. • U.S.S.R. launches read more...
... they see the virus spread and the death toll mount, with no vaccine, no specific treatment and no total understanding of how read more...
... they see the virus spread and the death toll mount, with no vaccine, no specific treatment and no total understanding of how read more...