Question

who developed the first effective polio vaccine and refused to patent it so that as many children as possible could get it quickly?
o enrico fermi
o jonas salk
o albert einstein
o charles richard drew

Explanation:

Jonas Salk developed the first - effective polio vaccine and chose not to patent it to make it widely available. Enrico Fermi was a physicist known for work in nuclear reactions. Albert Einstein was a physicist famous for theories of relativity. Charles Richard Drew made contributions to blood transfusion research.

Answer:

B. Jonas Salk