For decades, people died from diseases we can now prevent through vaccination. Jenner is known for developing the first vaccine, a vaccine for A) polio. B) smallpox. C) all germs. D) strep throat.

For decades, people died from diseases we can now prevent through vaccination. Jenner is known for developing the first vaccine, a vaccine for

A) polio.
B) smallpox.
C) all germs.
D) strep throat.

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