People under the age of 30 should not be offered the AstraZeneca vaccine, UK officials said. It follows reports of very rare — and potentially fatal — blood clots in people who got the shot. Officials said the decision was taken as young people face more risk of the clots, and less risk from COVID-19. The AstraZeneca coronavirus vaccine should not be given to people under the age of 30, UK officials said Wednesday. The UK's Joint Committee on Vaccines and Immunisation (JCVI) recommended offering under-30s another vaccine instead, though it said those who have already had one shot should get their second.