C.D.C. Panel Will Discuss Blood Clot Risk Linked to J.&J.’s Vaccine

U.S.|C.D.C. sheet volition sermon humor clot hazard linked to J.&J.’s vaccine.

• Dec. 15, 2021, 9:25 p.m. ET

Expert advisers to the Centers for Disease Control and Prevention volition conscionable connected Thursday to sermon what national wellness officials spot arsenic a concerning summation successful the rates of a uncommon but superior humor clotting upset linked to Johnson & Johnson’s coronavirus vaccine.

The Advisory Committee connected Immunization Practices volition spot caller information astatine the gathering that shows elevated risks of the information successful men and women, according to 1 national official, mounting the signifier for the experts to perchance urge caller restrictions connected the usage of the vaccine.

The F.D.A. connected Tuesday said that though problems arose successful men and women, the highest complaint was successful astir 1 successful 100,000 successful women aged 30-49.

Among the women who were diagnosed with the syndrome, which tin impair clotting and origin interior bleeding, astir 1 successful 7 of them died, the F.D.A. said. The national authoritative who described the readying for Thursday’s gathering said that updated figures showed astir 9 deaths from the disorder.

The sheet connected Thursday whitethorn counsel that the vaccine lone beryllium fixed to radical who cannot entree a antithetic marque oregon who privation it contempt the risk, oregon restrict it to definite groups.

The Washington Post first reported the plans for Thursday’s gathering and the caller national data.

Johnson & Johnson did not instantly instrumentality a petition for remark connected Wednesday evening.

About 16 cardinal people successful the United States person received a azygous changeable of the Johnson & Johnson vaccine arsenic their superior immunization, compared to 73 cardinal afloat immunized with Moderna’s vaccine and 113 cardinal with Pfizer’s. Among the radical successful the United States who person received a booster shot, conscionable 1.5 percent person gotten the 1 from Johnson & Johnson.

The broadside effect, known arsenic thrombosis with thrombocytopenia syndrome, tin impair clotting and origin interior bleeding. An accrued hazard for the information has been linked to the Johnson & Johnson vaccine and the changeable from AstraZeneca, which is not authorized successful the United States. It has not been linked to the vaccines from Moderna oregon Pfizer.

On Tuesday, the Food and Drug Administration announced that it added a warning to the vaccine’s information sheets for patients and providers, saying the changeable should not beryllium fixed to anyone who has had a clotting occupation aft a archetypal dose. The bureau said that it “continues to find” that the benefits of the vaccine outweigh its risks.

As much cases of the clotting upset were adjudicated by national wellness officials successful caller months, F.D.A. and C.D.C. officials grew progressively alarmed by the numbers presented to them by the C.D.C.’s immunization information office, which monitors reports successful the Vaccine Adverse Event Reporting System, oregon VAERS, a decades-old strategy that relies connected self-reported cases from patients and wellness attraction providers.

The reports of the information grew worrisome capable successful caller weeks that national officials determined they needed to telephone an exigency gathering of the C.D.C. advisers.

The Coronavirus Pandemic: Key Things to Know

In April, soon aft Johnson & Johnson’s vaccine started being administered successful the United States, national officials concisely recommended halting usage of the changeable due to the fact that of concerns astir the hazard of humor clots. At the time, the information had emerged successful six women, each of whom developed the unwellness wrong 1 to 3 weeks of vaccination. One of the women had died. By May, 28 cases had been confirmed.

The updated F.D.A. fact sheet for providers says that “currently disposable grounds supports a causal relationship” betwixt the information and Johnson & Johnson’s vaccine.

The caller information travel during a surge successful microorganism cases driven by the Delta coronavirus variant and Omicron, the mentation of the microorganism that has already go ascendant successful immoderate countries and is spreading accelerated successful the United States.

Several laboratory experiments suggest that a azygous dose of Johnson & Johnson’s changeable whitethorn connection small defence against corruption with Omicron. The institution said precocious past month that it is investigating humor samples from objective proceedings participants who person received its changeable arsenic a booster to spot however their vaccine-induced antibodies fare against Omicron.

The changeable has mostly fallen retired of favour successful the United States, contempt aboriginal hopes that its one-and-done format would beryllium casual to deploy successful much isolated communities, and among radical skittish astir receiving 2 doses.

Federal wellness officials in October authorized booster shots for radical who had received a azygous changeable of Johnson & Johnson vaccine astatine slightest 2 months earlier. They allowed for a “mix and match” approach, allowing radical to get a 2nd changeable of a Pfizer oregon Moderna vaccine. Among radical successful the United States who primitively received a azygous Johnson & Johnson changeable and past got a 2nd shot, less than 28 percent person gotten Johnson & Johnson arsenic their booster.

Christina Jewett contributed reporting.