Basil O'Connor defended the use of a version of this thing by saying it went through unprecedented tests for safety.
In 1950, Hilary Koprowski tested an early version of this thing at Letchworth Village. Basil O'Connor defended the use of a version of this thing by saying it went through unprecedented tests for safety. The contaminated production of this thing at Cutter Labs in 1955 resulted in five deaths. In 1956, Thomas Francis Jr. of the University of Michigan proclaimed the success of this thing in a broadcast funded by Eli Lilly and Company. An oral version of this thing was developed by Albert Sabin, who was opposed by the March of Dimes Foundation, which supported the work of another researcher. For 10 points, Jonas Salk developed the first effective form of what drug that prevented the spreading of an infectious disease that paralyzed many children?
In 1950, Hilary Koprowski tested an early version of this thing at Letchworth Village.
polio vaccine [or poliomyelitis vaccine; accept any answers about something that prevents polio] &lt;Cheyne&gt;