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IgorC [24]
3 years ago
6

The smallpox epidemic, Edward Jenner, and cowpox were all instrumental in the development of the first _____.

Health
2 answers:
snow_lady [41]3 years ago
5 0

Answer:ITS B

Explanation:

ANTONII [103]3 years ago
3 0
Vaccine also pastur created pencilin

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