People used vaccines to reduce the risk of infection by working with body as defenses to help them so this vaccines develop immunity to disease
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Answer: I believe it was an epidemic
Explanation:
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More than 99 percent of all species, amounting to over five billion species, that ever lived on Earth are estimated to be extinct. Estimates on the number of Earth's current species range from 10 million to 14 million, of which about 1.2 million have been documented and over 86 percent have not yet been described.
It is for the cells to make protein.
Which cells we don’t see no answer choices to really give a answer