 Definitely persist for at least a year and in some people it may persist even longer. And it may manifest 20 or 30 years from now with, you know, an early spate of heart attacks and strokes and so on that are current people who had damage from many, many years ago. We did see that after the 1918 flu. We're at a point where we've just come out of this pandemic and we're having to live with COVID. But, you know, we're looking over our shoulders because there's the avian influenza that's floating around out there and we don't know what that's going to morph into.