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Chemistry, 05.01.2021 20:30 erinwebsterrr

Which of the following statements is true? Edward Jenner developed the first vaccine for cowpox.
Before Jenner's vaccine, there was no prevention for smallpox.
Vaccination is only necessary for children under 5 years old.
Missed vaccinations can be given during "catch-up" periods.

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Which of the following statements is true? Edward Jenner developed the first vaccine for cowpox.

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