My Lords, I would put the truism slightly differently: the vaccine makes you pretty safe, but it does not mean you are not dangerous to other people. I think we all have to get used to that. Regarding the South African variant and the other variants popping up in Brazil and elsewhere, this is a manifestly different disease that is growing up around the world. It has a huge implication for international travel. We are working with the WHO and other groups to try to understand this, but it is certainly of grave concern to the country.