Who realized that a cowpox infection at an early age protected people against deadly smallpox infections? He had noticed that milkmaids were typically spared the ravages of smallpox.He turned this observation into vaccination by intentionally exposing a boy to cowpox to develop immunity and then later exposing the same boy to smallpox,which he survived.

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Edward Jenner realized that a cowpox infection at an early age protected people against deadly smallpox infections. He noticed that milkmaids were typically spared the ravages of smallpox and turned this observation into vaccination by intentionally exposing a boy to cowpox to develop immunity and then later exposing the same boy to smallpox, which he survived.

Who Realized That a Cowpox Infection at an Early Age