That is absolutely right. There have been two important changes in our arsenal in the past six weeks or so. The first has obviously been NHS test and trace, which is getting better the whole time, and is invaluable in fighting the disease. The second is the treatments. Dexamethasone, which was tested in this country, really does make a big difference to the mortality of the disease, and I have no doubt that other progress will be made. He is right to be reserved about the possibilities of getting a full vaccine; that is going to be very difficult. But in the meantime, we will have to remain extremely vigilant and extremely cautious.