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US Health Authorities Ask for Pause in J&J COVID-19 Vaccination

The FDA and CDC are investigating a handful of reports of blood clots that occurred several days after people received the one-and-done shot.

Written byKerry Grens
| 2 min read
johnson & johnson johnson&johnson j&j janssen covid-19 vaccine vaccination pandemic adenovirus vector blood clot side effect cerebral venous sinus thrombosis CVST sars-cov-2 coronavirus pandemic astrazeneca

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Update (April 26): On April 23, officials at the US Centers for Disease Control and Prevention and the Food and Drug Administration lifted the pause on the Johnson & Johnson vaccine. The FDA will add a warning about the risk for developing rare blood clots to fact sheets given to providers and patients, Reuters reports.

Following six cases of rare blood clots in women who had received Johnson & Johnson’s COVID-19 vaccine in the US, the Food and Drug Administration and the Centers for Disease Control and Prevention have recommended a temporary suspension of its rollout. In a statement released today (April 13), the agencies announced that they are investigating the reports of cerebral venous sinus thrombosis (CVST), the same condition observed as an extremely rare side effect of AstraZeneca’s COVID-19 vaccine.

“Until that process is complete, we are recommending a pause in the use ...

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Meet the Author

  • kerry grens

    Kerry served as The Scientist’s news director until 2021. Before joining The Scientist in 2013, she was a stringer for Reuters Health, the senior health and science reporter at WHYY in Philadelphia, and the health and science reporter at New Hampshire Public Radio. Kerry got her start in journalism as a AAAS Mass Media fellow at KUNC in Colorado. She has a master’s in biological sciences from Stanford University and a biology degree from Loyola University Chicago.

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