Source: Matthew Perrone and Lauran Neergaard, ABC NEWS, 5/5/22

U.S. regulators on Thursday strictly limited who can receive Johnson & Johnson’s COVID-19 vaccine due to the ongoing risk of rare but serious blood clots. The Food and Drug Administration said the shot should only be given to adults who cannot receive a different vaccine or specifically request J&J's vaccine. U.S. authorities for months have recommended that Americans starting their COVID-19 vaccinations use the Pfizer or Moderna shots instead.

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