 Well, thank you so much for that, Andrew. And we started at the beginning of this programme by talking about some things getting better in the world of global health. And we are ending with a good news story. And it's about an injection, which, if you have it, can prevent you from contracting HIV for six months. This is quite something, isn't it? Oh, it's incredible. I mean, this is really encouraging news coming out of a trial that was run in South Africa and Uganda. And who was this trial done with?