The United States government on Saturday granted emergency approval to the COVID-19 vaccine developed by Johnson & Johnson, making it the third vaccine available to the public in the US. Earlier, the US Food and Drug Administration (FDA) had granted emergency use authorization to vaccines developed by Pfizer/BioNTech and Moderna. Notably, J&J's vaccine requires a single dose, unlike the other two shots.
source https://www.newsbytesapp.com/news/world/united-states-fda-authorizes-j-j-s-covid-19-vaccine/story
source https://www.newsbytesapp.com/news/world/united-states-fda-authorizes-j-j-s-covid-19-vaccine/story
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