he's professor of public health at bristol university. a warm welcome to each of you, and thanks for joining us today on inside story. patrick, let me start with you today. um, what danger does cobit 19 now ppos, and how much cause for concern is there at this particular time. the 1st of all, thank you for having me on the show. i'm go with 19 now has to be looked at in perspective of all of the various geared towards the viruses, the also circulating and all the other public health emergencies that we have to deal with. right now, so, so what's happening from the beginning of the over to now is that we've built up a lot of hidden units, each will, through our vaccination campaigns, as well as through natural infection. so much of the world has them unity either through one of those or both of those routes. so we're in a much better position to handle new ways of the, the infection now. but it still remains the danger because the virus is evolving in a way that's faster than some of the other viruses back that we normally, we have have li