Question

Edward Jenner's contribution for the eradication of small pox is

• A. His proposition that smallpox has possibly spread throughout the world from India and China.
• B. His discovery of transformation procedure.
• C. His finding that rubbing of the skin crust of smallpox victims on the arm of a healthy person would develop resistance against smallpox.
• D. His finding that the cowpox infection protects the person from subsequent infection from small pox.

Answer 1

Answer: (D)

His finding that the cowpox infection protects the person from subsequent infection from small pox.

Edward Jenner observed that the person who has suffered from cowpox infection develops immunity against smallpox. This is due to the development of the antibodies against the infection in first response which can fight the viruses, preventing infection during the second attack. According to Edward Jenner, the cow-pox infection protects the person from small-pox due to development of more amount of antibodies as the secondary response.

Thus, the correct answer is 'His finding that the cowpox infection protects the person from subsequent infection from smallpox'.