The temporary halt comes as UK regulators review the occurrence of rare blood clots in adults

A pediatric trial of the Oxford-AstraZeneca vaccine has been paused pending a review by the UK’s medicines regulator of rare blood clot cases in adults, a University of Oxford spokesperson told CNN Tuesday.A pediatric trial of the Oxford-AstraZeneca vaccine has been paused pending a review by the UK’s medicines regulator of rare blood clot cases in adults, a University of Oxford spokesperson told CNN Tuesday.