FDA Restricts J&J’s COVID-19 Vaccine Over Risk of Blood Clots

The Food and Drug Administration (FDA) announced on May 5 that it will restrict the use of the Johnson & Johnson COVID-19 vaccine to adults who can’t receive mRNA vaccines, because of the risk of potentially life-threatening side effects with the J&J shot.

The agency said the COVID-19 vaccine can now only be administered to people aged 18 years of age and older who can’t receive either the Moderna or Pfizer vaccines, both of which are two-dose vaccines and use mRNA technology. J&J’s single-shot vaccine uses adenovirus technology.

People 18 and older who...