April 13, 2021 — After receiving studies of a uncommon blood clot in individuals receiving the Johnson & Johnson COVID-19 vaccine, the FDA and the CDC have advisable a pause in using the vaccine, pending additional investigation.

Right here, what it’s worthwhile to know:

Why was the pause recommended?

After reviewing knowledge, the businesses discovered six studies of people that skilled uncommon blood clots together with low platelets, that are the smallest blood cells and concerned in clotting. The six studies have been came upon of greater than 6.8 million doses given. The FDA and CDC initiated the pause ”out of an abundance of warning.”

What else is understood?

In response to a joint assertion issued by the CDC and FDA, all six circumstances have been in ladies between ages 18-48. Signs occurred 6-13 days after vaccination. The kind of clot is understood medically as a cerebral venous sinus thrombosis (CVST) and was seen together with low ranges of blood platelets. Go right here to be taught extra about these types of blood clots. 

Of the six circumstances, one lady died; one other was in essential situation.

Remedy of such a clot is completely different from that for different sorts, the CDC and FDA say. Usually, an anticoagulant drug, heparin, is used. However for such a clot, various remedy could also be wanted.

Why does it occur?

“We do not have a definitive reply right now, nevertheless it seems to contain an immune response associated to the J&J vaccine that adversely impacts the perform of the platelets, which in flip prevents the conventional clotting course of from occurring,” says Robert Glatter, MD, emergency physician at Lenox Hill Hospital in New York Metropolis.

He says that the reason “might finally be associated to the adenovirus vector [used in the vaccine] itself.”

Why does it appear to have an effect on ladies greater than males?

That’s not but identified, says William Schaffner, MD, professor of preventive drugs and infectious illness specialist at Vanderbilt College Medical Heart in Nashville. “This has been true for the AstraZeneca [vaccine] as effectively and their blood clot points,” he says. Whether it is an immune-related situation, ladies do are likely to have extra of these points than males, generally, he says.

What ought to individuals who received the J&J vaccine know and do?

Remember the fact that the studies of blood clots have been uncommon, Schaffner suggests. The probabilities are about 1 in 1,000,000, based mostly on the six studies out of 6.8 million doses given. “That is truly a testomony to the sensitivity of our vaccine security system,” he says, that these few studies can be detected out of thousands and thousands of doses.

Individuals who have gotten the vaccine needs to be vigilant of signs, the FDA and CDC say. When you obtained the Johnson & Johnson vaccine and develop extreme headache, abdominal pain, leg ache, or shortness of breath inside 3 weeks of vaccination, contact your their well being care supplier.

How lengthy will the pause final?

That can be not but identified. The CDC’s Advisory Committee on Immunization Practices (ACIP) will meet on Wednesday to additional assessment the circumstances and ”assess their potential significance.” FDA can be reviewing the information additional.

WebMD Well being Information


CDC: “Joint CDC and FDA Assertion on Johnson & Johnson COVID-19 Vaccine.”

Johnson & Johnson: “Johnson & Johnson Assertion on COVID-19 Vaccine.”

William Schaffner, MD, professor of preventive drugs and infectious illness specialist, Vanderbilt College Medical Heart, Nashville. 

Robert Glatter, MD, emergency doctor, Lenox Hill Hospital, New York Metropolis. 

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