briefly paused in mid-April after rare blood clot cases were reported in a small number of recipients. As blood clot concerns spread across the U.S., the Centers for Disease Control and Prevention (CDC) and U.S. Food and Drug Administration (FDA) investigated the vaccine and the reactions, ultimately determining that the benefits of the Johnson & Johnson vaccine far outweigh its risks. They lifted the pause on Apr. 23, and now, more than one week after the vaccine went back into circulationModerna Caused This Reaction in 82 Percent of People, New Study Says.
And for more vaccine news, check out Pfizer Caused This Reaction in Half of Recipients, New Study Says.
The remaining three percent of vaccine recipients, 343 people, reported “serious” side effects, the CDC explains. In total, 17 of those were thrombosis with thrombocytopenia syndrome (TTS), including 14 blood clots of the brain called cerebral venous sinus thrombosis (CVST). In looking at the full 13,725 events reported via VAERS, that’s a 0.1 percent rate of blood clots. These adverse reactions have primarily been in women under 50, though some have been slightly older and recently, there was a case involving a man
Janet Woodcock, MD, said in a statement: “We have concluded that the known and potential benefits of the Janssen COVID-19 vaccine outweigh its known and potential risks in individuals 18 years of age and older.”
Sandra Fryhofer, MD, the American Medical Association’s (AMA) liaison to the CDC’s Advisory Committee on Immunization Practices (ACIP), recently spoke about the “rare but serious” risk
“Patients who’ve had the Janssen vaccine should seek immediate medical attention if they develop shortness of breath, chest pain, leg swelling, persistent abdominal pain, neurological symptoms including severe or persistent headache or blurred vision, or petechiae beyond the site of vaccination,” Fryhofer said during a Apr. 26 video update on the AMA website.
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In the same AMA video, Fryhofer said flu-like symptoms—”a mild to moderate headache, fatigue, fever, muscle aches”—should be expected after any COVID vaccination. She noted the mild to moderate side effects “usually resolve within one to two days.”
And for more on vaccine reactions, This Vaccine Side Effect Could Mean You Already Had COVID, New Study Says.
According to the research, younger people were more likely to faint. “As use of COVID-19 vaccines expands into younger age groups, providers should be aware that younger persons might be more highly predisposed to anxiety-related events after vaccination than are older persons,” the study explains.
And for more vaccine news, The CDC Says People Who Get COVID After Vaccination Have This in Common.