Question

who developed the polio vaccine in 1955, contributing to the end of the polio epidemic?

edward jenner

thomas edison

albert einstein

jonas salk

Explanation:

Edward Jenner developed the smallpox vaccine, Thomas Edison was an inventor (e.g., of the light bulb), Albert Einstein was a physicist known for relativity. Jonas Salk developed the polio vaccine in 1955.

Answer:

D. Jonas Salk