An AstraZeneca vaccination kit is placed on a table at a vaccination center in Bucharest, Romania, Wednesday, April 7, 2021. British authorities recommended Wednesday that the AstraZeneca COVID-19 vaccine not be given to adults under 30 where possible because of strengthening evidence that the shot may be linked to rare blood clots, a recommendation that came as regulators both in the United Kingdom and the European Union emphasized that the benefits of receiving the vaccine continue to outweigh the risks for most people — even though the European Medicines Agency said it had found a “possible link” between the shot and the rare clots.(AP Photo/Vadim Ghirda)