The EU's drug regulator has said it has launched a review of possible links between the Johnson & Johnson coronavirus vaccine and blood clots after reports of four cases, one of them fatal.
The European Medicines Agency (EMA) said its safety committee "has started a review of a safety signal to assess reports of thromboembolic events" with people who had received the shot. "Four serious cases of unusual blood clots with low blood platelets have been reported post-vaccination with Covid-19 Vaccine Janssen," the EMA said, referring to US pharma giant J&J's European subsidiary. "One case occurred in a clinical trial and three cases occurred during the vaccine rollout in the USA.