Question

Jenner prepared the vaccine for small pox by using

• A. Attenuated pathogen of small pox virus
• B. Smaller doses of small pox virus
• C. Attenuated form of cow pox virus
• D. Material from cow pox pustule

Answer 1

The correct option is D

Material from cow pox pustule

The correct option is D:

Explanation of the correct option :

Option D:

1. Edward Jenner observed that people who suffered from cowpox did not suffer from smallpox.
2. He obtained pus from the cowpox pustule of an infected girl and injected it into a healthy boy.
3. The boy got cowpox and when later injected with smallpox, did not develop the disease.
4. Microbes of the cowpox virus prevented the occurrence of the smallpox virus.

Explanation of the incorrect option :

Option A :

The unattenuated pathogen of the cowpox virus was used for the preparation of the vaccine.

Option B :

A single dose of the cowpox virus was used.

Option C :

An unattenuated form of the cowpox virus was used.

Final answer: Jenner prepared the vaccine for smallpox by using material from cowpox pustule.