Conversation so far:
Where did Jonas Salk go to medical school?
New York University Medical School
What time period did Jonas Salk go to New York University Medical School?
1934-1939
What did Jonas Salk study in medical school?
Jonas Salk had decided he did not want to practice medicine. Instead, he became absorbed in research, even taking a year off to study biochemistry.
Did Jonas Salk study anything else in medical school besides biochemistry?
Jonas Salk later focused more of his studies on bacteriology which had replaced medicine as his primary interest.

Question: What else did he do in this time period?
Self-contained rewrite: What else did Jonas Salk do in the 1930s besides attend medical school?