Six American women who have received the Johnson & Johnson COVID vaccine have developed some type of blood clotting condition, similar to what happened in Europe with the AstraZeneca vaccine. The FDA and CDC have put out a joint statement recommending a pause on further administration of the J&J vaccine until more research is done.
U.S. Calls for Pause on Johnson & Johnson Vaccine After Blood Clotting Cases - The New York Times (nytimes.com)
U.S. Calls for Pause on Johnson & Johnson Vaccine After Blood Clotting Cases - The New York Times (nytimes.com)