The Food and Drug Administration and the Centers for Disease Control will stop using the Johnson & Johnson vaccine at federal sites and urge states to do so as well while they investigate the safety issues.
Six recipients in the United States developed a rare disorder involving blood clots within about two weeks of vaccination.
All six recipients were women between the ages of 18 and 48. One woman died and a second woman in Nebraska has been hospitalized in critical condition, the officials said.
Nearly seven million people in the United States have received Johnson & Johnson shots so far, and roughly nine million more doses have been shipped out to the states, according to data from the Centers for Disease Control and Prevention.
You can find more information on adverse reactions to the vaccine at the CDC's website.