direct to your inboxThe World Health Organisation has urged people not to visit family and friends this Christmas as it is 'not worth the risk' of catching Covid-19.With more than two-thirds of England’s population to be living under Tier 3 measures from Saturday as the UK Government tries to stem rising infections, WHO said 'the safest thing to do right now is to remain at home'.But restrictions will still be relaxed between December 23 and 27 when three households will be allowed to meetDr Hans Kluge, WHO regional director for Europe, said: "There remains a difference between what you are being permitted to do by your authorities and what you should do."In a statement, he said: "We have a few more months of sacrifice ahead and can behave.