As a number of governments halt the AstraZeneca shots, experts worry about the longer term impact

Within the space of a few days, the rollout of the Oxford-AstraZeneca Covid-19 vaccine has ground to a standstill in virtually all of western Europe.Within the space of a few days, the rollout of the Oxford-AstraZeneca Covid-19 vaccine has ground to a standstill in virtually all of western Europe.