The European Union’s health agency is investigating a small number of reports of severe blood clots among people who have received the Johnson & Johnson Covid-19 vaccine.
There have been four reported cases of serious blood clots, including one death, in people who received the J&J vaccine, the European Medicines Agency said on Friday. One case occurred in a clinical trial and three were in people given the shot as part of the U.S. vaccination campaign.
The EMA said it isn’t clear yet whether there is a connection between the vaccine and the blood clots and that the agency could decide to mandate an update to the safety information included with the vaccine. Last month, the EMA approved the J&J vaccine—which is branded as Janssen, a J&J unit— for use in the EU, but the rollout isn’t expected to begin until later this month.
“Our close tracking of side effects has revealed a small number of very rare events following vaccination,”…