We increasingly hear a line of argument—I understand the sentiments that drive it; I really do—that we should not be bothered about case numbers, because Covid is now mainly, but not exclusively, although much more than it was before, affecting younger people, and because younger people are far less likely to end up in hospital, to become seriously ill or to die. Because the link between cases and serious acute illness has weakened, we are not as driven only by case numbers, as was the case previously.