AstraZeneca says ‘no evidence’ of blood clot risk from vaccine as countries suspend its use

The global rollout of the Oxford-AstraZeneca Covid-19 vaccine has encountered another hurdle as a handful of countries paused their use of the shot following reports it could be linked to blood clots, despite no clear evidence of a link to the shot.The global rollout of the Oxford-AstraZeneca Covid-19 vaccine has encountered another hurdle as a handful of countries paused their use of the shot following reports it could be linked to blood clots, despite no clear evidence of a link to the shot.