My right hon. Friend is rightly engrossed day to day in dealing with the developments of covid-19, but I would like to ask him to cast his mind a little further forward. The chief scientific adviser and the chief medical officer have been clear that the best solution to this is a vaccine, but the chief scientific adviser has said that that could be as much as a year away. He has also suggested that, until that vaccine is available, it may be difficult to ease restrictions successfully. Does my right hon. Friend agree with that analysis, and if so, what does a sensible exit strategy look like?