Multiple choice

Polio-immunising vaccine was developed by

  1. E. Jenner

  2. Salk

  3. St. Hale

  4. Landsteiner

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Jonas Salk developed the first successful polio vaccine in 1955 using inactivated poliovirus. Edward Jenner developed the smallpox vaccine, and the other options are not associated with polio vaccine development.