Conversation so far:
How did Jonas Salk get involved in Polio research?
In 1948, Harry Weaver asked Jonas Salk to find out if there were more types of polio than the three then known, offering additional space, equipment and researchers.
Where was Jonas Salk's lab located?
In 1947, Jonas Salk became ambitious for his own lab and was granted one at the University of Pittsburgh School of Medicine.

Question: Did anyone assist with his research?
Self-contained rewrite: Did anyone assist Jonas Salk with his research?