The virus scare.
Markowitz
Gerald
G
John Jay College, Graduate Center, City University of New York, NY, USA.
D049673:History, 20th Century; D006801:Humans; D011051:Poliomyelitis / Q000266:history*; D023321:Poliovirus Vaccines / Q000266:history*; D014481:United States
D023321:Poliovirus Vaccines