Question

What was one of the challenges Dr. Salk faced in his attempt to create a polio vaccine?

Answer 1

A: Dr. Salk did not have enough money to pay for his research and supplies.
B:Dr. Salk had to create one vaccine that was effective against three different viruses
C:Dr. Salk had to convince government officials to allow him to test the vaccine.
D:Dr. Salk's idea for a vaccine was not supported by other scientists and physicians.

Answer 2

C:Dr. Salk had to convince government officials to allow him to test the vaccine.

Answer 3

C