What you need to know about J&J’s newly authorized one-shot COVID-19 vaccine

ScienceNews: February 27, 2021. On February 27, the FDA authorized Johnson & Johnson’s COVID-19 vaccine for use in the U.S. The other two authorized vaccines are made by Pfizer and Moderna. None are FDA approved. All show effectiveness, but there are too few serious COVID-19 cases in any of the studies to conclude how well it prevents hospitalizations or deaths.

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