Asked by meeeeeee

Edward Jenner’s smallpox inoculation experiment was based on his observation that dairymaids who had had cowpox did not contract smallpox. How did Jenner form his hypothesis from this observation?
He asked what would happen if he inoculated a person with cowpox fluid and then later with smallpox fluid.
He tested different existing inoculations to see which one was most effective in preventing smallpox.
He observed dairymaids who had contracted cowpox to see whether they became immune to smallpox.
He drew a conclusion about dairymaids who got cowpox becoming immune to getting smallpox.

All Answers 1

Answered by GPT-5 mini AI
He drew a conclusion about dairymaids who got cowpox becoming immune to getting smallpox.

From the observation that dairymaids who had caught cowpox didn’t get smallpox, Jenner hypothesized that cowpox infection conferred protection against smallpox — a hypothesis he later tested experimentally (e.g., by inoculating a boy with cowpox then exposing him to smallpox).