CDC staff reported there have been 15 cases of the unusual disorder, among 7.89 million doses of the J&J vaccine delivered in the United States. All of the cases were in women, except for one man in the clinical trial.
The rare condition includes a combination of blood clots, many in unusual locations such as the brain or abdomen, and low levels of platelets, which help wounds heal. It has been dubbed thrombosis with thrombocytopenia syndrome or TTS.