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?
Answer
A
He asked what would happen if he inoculated a person with cowpox fluid and then later with smallpox fluid.
B
He tested different existing inoculations to see which one was most effective in preventing smallpox.
C
He observed dairymaids who had contracted cowpox to see whether they became immune to smallpox.
D
He drew a conclusion about dairymaids who got cowpox becoming immune to getting smallpox.