Sweden won’t start vaccinating people with Johnson & Johnson’s Covid-19 shot until the European Medicines Agency (EMA) reviews reports of rare blood clots possibly caused by it in the US, the Swedish Health Agency said.

On Tuesday, the US Food and Drug Administration (FDA) recommended that states pause their use of the J&J vaccine after six of its recipients developed a “rare and severe type of blood clot.” Over 6.8 million doses have been administered.

Johnson & Johnson reacted to the development by delaying delivery of its Covid-19 vaccine to the EU. The health complications were similar to those that earlier sparked the suspension of the AstraZeneca vaccine in several countries, and which has seen age limits imposed on its use after UK and EU health regulators posted updated reviews of it.

The EMA said on Wednesday that it was investigating the reported cases of “very rare” blood clots, while working in close contact with the FDA and other international agencies. (RT)