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CDC identifies more cases of blood clots after J&J vaccine; reaction remains extremely rare

Johnson & Johnson COVID-19 Vaccine
Posted at 3:02 PM, Apr 23, 2021
and last updated 2021-04-23 15:02:19-04

More cases of a rare clotting reaction to the Johnson & Johnson COVID-19 vaccine have been identified since the single-shot dose was paused earlier this month.

During a hearing Friday with a CDC advisory panel about whether the pause should be lifted, a doctor with the CDC said the number of dangerous blood clots associated with the vaccine had increased to 15. Initially, there were 6 reported cases.

The reaction remains extremely rare. The 15 cases of blood clots is among the nearly 8 million Johnson & Johnson COVID-19 vaccine shots given in this country.

Dr. Tom Shimabukuro said of the 15 confirmed blood clots with low platelet counts, 12 of them resulted in a clot in veins near the brain, called “cerebral venous sinus thrombosis.”

All 15 cases occurred in women; most were in their 30s, although the age range of patients was 18 to 59. Three women have died from the blood clots.

Symptoms, including headaches, were reported about 1-2 weeks following vaccination, Shimabukuro told the panel.

“We will certainly continue our enhanced surveillance for this,” Shimabukuro said.

The Advisory Committee on Immunization Practices is a panel made up of experts in immunizations and makes recommendations to the Centers for Disease Control and Prevention about a wide range of vaccines.

Following the FDA and CDC April 13 recommended pause on the Johnson & Johnson vaccine, the committee delayed a decision last week to gather more information about the blood clots and other risks and benefits of the vaccine.

They are meeting Friday to consider lifting the pause on Johnson & Johnson vaccine, and whether certain people should not receive the vaccine.

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