In what year was the first person vaccinated by Edward Jenner?
Correct answer: B. 1796
- A. 1876
- B. 1796
- C. 1696
- D. 1850
Explanation
Correct option is B. Dr Edward Jenner created the world's first successful vaccine. He found out that people infected with cowpox were immune to smallpox. In May 1796, English physician Edward Jenner expanded on this discovery and inoculated 8-year-old James Phipps with matter collected from a cowpox sore on the hand of a milkmaid.
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Specific defense mechanisms provide targeted immunity through B lymphocytes, T lymphocytes, antibodies and memory cells that recognize particular antigens. Questions cover humoral and cell mediated responses, clonal selection, primary and secondary immune responses, vaccination and passive immunity, while distinguishing adaptive defenses from the immediate, non specific innate response.
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