something that was very dangerous. there were also, as time went on, there was more evidence about droplet spray and so on and the potential of masks to interrupt transmission. so what you are seeing their in that exchange is a natural political result of a change in advice and a change in understanding of the virus eventually bringing about a change in policy and that is what you would expect. it’s about a change in policy and that is what you would expect. about a change in policy and that is what you would expect. it s what we are seeinu what you would expect. it s what we are seeing here what you would expect. it s what we are seeing here in what you would expect. it s what we are seeing here in fact what you would expect. it s what we are seeing here in fact quite - what you would expect. it s what we are seeing here in fact quite simply| are seeing here in fact quite simply what is are seeing here in fact quite simply what is on are seeing here in fact quit