we spoke to david barrow, the world health organization, special envoy for coven, about how best to manage the risk of the viruses. we stand at the moment. i mean, we can't be 100 percent. certain the vaccine use that we have at the moment will protect us against all possible versions of this virus. so therefore, we should be accepting vaccines will reduce our risk of getting covered quite nicely, actually box. they're not going to guarantee. and therefore, what we're saying is huge vaccines is part of your control effort. but also why not just keep going with the physical distancing the one me to row? why not keep going with ma squaring? why not keep going with really good hygiene? why not keep going with isolation when you're sick? why not keep going with protecting elderly people and those who got other diseases with the back scenes because they are really good protective? if there is the perception conveyed to the population of any country, that basically we're all going to say we're going to break the 3 break free and we're not going to be troubled by the virus. and there's no turning