In 1905, the agency that would later become part of the US Food and Drug Administration approved its first vaccine. Now the FDA has more than 80 licensed vaccines, and for each there has been an established scientific protocol to make sure it's safe and effective.
from CNN.com - RSS Channel - HP Hero https://www.cnn.com/2020/09/05/health/covid-19-vaccine-approval-process-politics/index.html
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