What did Jenner use to create the smallpox vaccine?
Cowpox virus
Chickenpox virus
Measles virus
Flu virus
Answer
Cowpox virus, a mild disease in cows, was used by Edward Jenner to create the smallpox vaccine. Jenner observed that milkmaids who had been exposed to cowpox were immune to smallpox, a deadly disease at the time. He hypothesized that cowpox exposure protected against smallpox and tested this by deliberately infecting a boy with cowpox and then exposing him to smallpox.
Edward Jenner: The Vaccine Visionary Quiz
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