U.K. first in world to start using Oxford-AstraZeneca vaccine

The rollout of the new vaccine comes at a crucial moment for U.K. authorities, who are battling a surge in infections blamed on a new virus variant that authorities have said is much more contagious.

The rollout of the new vaccine comes at a crucial moment for U.K. authorities, who are battling a surge in infections blamed on a new virus variant that authorities have said is much more contagious.