Johnson & Johnson’s vaccine awaits use in a freezer. | Photo by Matthias Bein / picture alliance via Getty Images

The Food and Drug Administration added a warning to the fact sheet for the Johnson & Johnson COVID-19 vaccine saying that the shot may lead to an increased risk of a nerve condition called Guillain–Barré syndrome. The agency says that the benefits of the vaccine still outweigh the risk.

There have been around 100 cases of the syndrome reported among the roughly 12.6 million people who have received the Johnson & Johnson vaccine, the Centers for Disease Control and Prevention said in a statement to The Washington Post. It’s a very rare complication, but people who have received the shot appear to be around 3 to 5 times more likely to develop Guillain–Barré syndrome than the general population.

There’s no sign that the Moderna or Pfizer…

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