Margaret Harris
A WHO spokesperson said it was the "morally right thing to do" because rollout "needs to be fair" across the world.
A World Health Organisation doctor says Britain has overtaken France to become the European country worst-hit by the second wave.
Margaret Harris said: "We all need to get our heads around is this is a new virus and...this one is behaving differently."
Government officials are drawing up plans to ban mass gatherings, and the US travel ban has now come into force. Here's the latest.