It's 96% effective against the original covid strain, 86% effective against UK variant B.1.1.7, but only 49% effective against the South African variant B.1.351...
Smart smaller countries that can't get supplies should approve this now and have all the supply to themselves. Or maybe the EU can do that instead of trying to get the UK supply...
Worth remembering these vaccines are even more successful at stopping death and hospitalisation, than the headline efficacy figures. The headline figures count <i>any</i> COVID as a failure.