Description : Jonas Salk invented the vaccine for - (1) Polio (2) Hepatitis (3) Typhoid (4) Cholera
Last Answer : (1) Polio Explanation: Jonas Edward Salk was an American medical researcher and virologist, best known for his discovery and development of the first polio vaccine. The field trial set up to test the ... of Michigan, the monitor of the test results, "declared the vaccine to be safe and effective."