Question

what was jenners hypothesis?

Explanation:

Identify Jenner's observations

Edward Jenner observed that milkmaids who contracted cowpox seemed immune to smallpox.

Formulate the hypothesis

Using Edward Jenner and Smallpox and Cowpox concepts, he proposed a testable explanation.

State the hypothesis

He hypothesized that infection with cowpox protects a person from smallpox infection.

Connect to vaccination history

This hypothesis laid the foundation for the History of Vaccination.

Answer:

Edward Jenner's hypothesis was that infection with cowpox (a mild disease) provides immunity against smallpox (a fatal disease).