On this March 31, 2021, file photograph, a nurse fills a syringe with Johnson & Johnson’s one-dose COVID-19 vaccine on the Vaxmobile, on the Uniondale Hempstead Senior Heart, in Uniondale, N.Y. U.S. well being regulators on Tuesday, April 13, is recommending a “pause” in utilizing the vaccine to research stories of doubtless harmful blood clots. (AP Photograph/Mary Altaffer, File)

A uncommon, rogue immune response is the principle suspect as authorities examine extremely uncommon blood clots following use of two related COVID-19 vaccines from Johnson & Johnson and AstraZeneca.

The U.S. really useful that states pause giving the J&J vaccine on