События
The Poliomyelitis Vaccination Act
was passed by Congress and signed
by President Eisenhower. This act
provided 9.8 million doses.Sabin vaccine developed
and released to other
researchers of polio.200 million people
have received the Salk vaccine.Polio decreased dramatically
by this time.Sabin vaccine was proven safe
and was released to all people.The Salk vaccine
was proven safe.
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