April 13, 2021 — After receiving reviews of a uncommon blood clot in folks receiving the Johnson & Johnson COVID-19 vaccine, the FDA and the CDC have beneficial a pause in the usage of the vaccine, pending additional investigation.

Right here, what it’s essential know:

Why was the pause instructed?

After reviewing knowledge, the companies discovered six reviews of people that skilled uncommon blood clots together with low platelets, that are the smallest blood cells and concerned in clotting. The six reviews 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 thought?

In accordance with a joint assertion issued by the CDC and FDA, all six instances have been in girls between ages 18-48. Signs occurred 6-13 days after vaccination. The kind of clot is thought 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 some of these blood clots. 

Of the six instances, one lady died; one other was in vital situation.

Remedy of any such clot is totally different from that for different varieties, the CDC and FDA say. Sometimes, an anticoagulant drug, heparin, is used. However for any such clot, different remedy could also be wanted.

Why does it occur?

“We do not have a definitive reply presently, however 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 traditional 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 in the end be associated to the adenovirus vector [used in the vaccine] itself.”

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

That isn’t 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 properly and their blood clot points,” he says. Whether it is an immune-related problem, girls do are likely to have extra of these points than males, usually, he says.

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

Take into account that the reviews of blood clots have been uncommon, Schaffner suggests. The possibilities are about 1 in one million, primarily based on the six reviews 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 reviews can be detected out of thousands and thousands of doses.

Individuals who have gotten the vaccine must be vigilant of signs, the FDA and CDC say. In the event you obtained the Johnson & Johnson vaccine and develop extreme headache, belly ache, 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 overview the instances 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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