WASHINGTON (AP) – The U.S. on Tuesday recommended a “pause” in using the single-dose Johnson & Johnson COVID-19 vaccine to investigate reports of rare but potentially dangerous blood clots, a development that could jeopardize the rollout of vaccines around the world.
The Centers for Disease Control and Prevention and the Food and Drug Administration announced that they were investigating unusual clots that occurred 6 to 13 days after vaccination.
The FDA commissioner said she expected the pause to last a matter of days.
The clots occurred in veins that drain blood from the brain and occurred together with low platelets, the fragments in blood that normally form clots.
All six cases were in women between the ages of 18 and 48. One person died, and all of the cases remain under investigation.
More than 6.8 million doses of the J&J vaccine have been given in the U.S., the vast majority with no or mild side effects.
If you’ve received the J&J vaccine and develop a severe headache, abdominal pain, leg pain, or shortness of breath within three weeks of your vaccination date, contact your health care provider immediately.