The first scientifically approved vaccine was:
Correct answer: B. Small Pox Vaccine
- A. Oral Polio vaccine
- B. Small Pox Vaccine
- C. MMR Vaccine
- D. Tetanus Vaccine
Explanation
The first scientifically approved vaccine was the smallpox vaccine. It was developed by Edward Jenner in the late 18th century. Jenner observed that milkmaids who had contracted cowpox, a less severe disease, seemed to be protected from smallpox. He tested his hypothesis by taking material from a cowpox sore and inoculating a young boy with it. The boy subsequently showed immunity to smallpox. Therefore, option b is correct.
This question appeared on the KMU Centralized Admission Test 2022 paper, which you can sit online with every answer explained.
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