Multiple choice

Directions: In which year given discovery/invention was made:

Anti Polio Vaccine

  1. 1867

  2. 1955

  3. 1968

  4. 1884

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

The oral polio vaccine was developed by Albert Sabin and first used extensively around 1961, while Jonas Salk developed the inactivated polio vaccine (IPV), which was declared safe and effective in 1955. Thus, 1955 is the correct historical year associated with the breakthrough of the polio vaccine.

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