U.S. health officials recommended a pause in the use of Johnson & Johnson’s Covid-19 vaccine on concerns of rare and severe blood clotting side effects.
Cerebral venous sinus thrombosis was seen in combination with low levels of blood platelets in six women between the ages of 18 and 48, the U.S. Centers for Disease Control and Prevention and Food and Drug Administration said Tuesday.
As of April 12, more than 6.8 million doses of the vaccine have been administered, the agencies said.
The CDC on Wednesday will convene a meeting of its Advisory Committee on Immunization Practices to review the cases and assess their potential significance.
The FDA will review the CDC’s assessment as it investigates these cases.