World U.K. says under-30s should get a non-AstraZeneca option; E.U. finds a ‘possible link’ to rare clots. April 7, 2021April 7, 2021Benjamin Mueller, Monika Pronczuk and Matina Stevis-GridneffComments Off on U.K. says under-30s should get a non-AstraZeneca option; E.U. finds a ‘possible link’ to rare clots.