Additional clot cases tied to Johnson & Johnson COVID-19 vaccine: CDC - Fox News

An official with the Centers for Disease Control and Prevention (CDC) announced more than two dozen total blood clot cases in individuals who received Johnson & Johnson’s one-shot COVID-19 vaccine amid a backdrop of 8.7 million recipients.

Tom Shimabukuro with the CDC COVID-19 vaccine task force noted 28 total cases of so-called thrombosis with thrombocytopenia (TTS) following J&J vaccination reported through a national surveillance system, Vaccine Adverse Event Reporting System (VAERS).

The update marks an increase from a previously reported 17 instances in late April, when the agency was investigating two new cases of a rare, severe blood clot that occurred alongside low platelets in Johnson & Johnson COVID-19 vaccine recipients, in addition to 15 previously reported TTS cases.

Shimabukuro presented data indicating females aged 30 to 39 had the highest reporting rates of TTS at 12.4 cases per million doses administered, though females aged 40 to 49 had the "most pronounced" increase in cases; the reporting rate in this age group is 9.4 clot cases per million doses administered.

No confirmed clotting cases have occurred after more than 135 million administered doses of Pfizer’s COVID-19 vaccine, nor after over 110 million doses administered of Moderna’s jab.

The advisory committee on April 23 recommended that the Johnson & Johnson COVID-19 vaccine resume rollout, but include new language on the product’s emergency use authorization (EUA) warning remote risks of serious blood clots