The noble Lord, Lord Scriven, asks all the right questions. The honest answer is that it is a changing situation. The information that I had on this a week ago has changed even to today. What I can tell you is that there is an enormous global effort going into research in this area. The noble Lord, Lord Scriven, rightly cites the Singapore test, about which we are in touch and keen to find out more. A huge number of offers are incoming to the central co-ordinating committee. An enormous amount of funding and money is coming not just from the UK but from America, Europe and all the major nations trying to crack this. I live in hope that we will be able to do mass testing within the near horizon.