http://www.newsweek.com/astrazeneca-vaccine-blood-clots-europe-it-safe-1575617

Scientists have said it is unlikely that the AstraZeneca vaccine causes blood clots after a number of EU countries temporarily stopped using it due to safety concerns.

On March 11, Denmark, Iceland, and Norway all said they were suspending use of the vaccine amid reports a small number of people had developed blood clots after receiving it.