Conversation so far:
How did Salk get involved in Polio research?
Salk became ambitious for his own lab.
Where was his lab located?
University of Pittsburgh.
Did anyone assist with his research?
assisted by the staff at the D.T.
Watson Home for Crippled Children.
How did he fund his research?
involving 100 million contributors to the March of Dimes.
Did his research lead to a vaccine being made?
Salk's inactivated polio vaccine was the first vaccine for the disease.

Question: What year was the vaccine introduced for use?
Self-contained rewrite: What year was Jonas Salk's Polio vaccine introduced for use?