 I think the big thing is how unique to COVID and how quickly can you get that kind of blood test for something completely new. Because if you think we're talking, we're approaching the fifth anniversary of COVID in a few months' time. In those first few months, like the idea that you could turn around a brand new piece of technology like this, I mean, kind of like it's just never going to happen. And that's the thing about pandemics. Everyone is having to act so quickly against something completely new and completely novel. Now, if you did have something like this and you could add it to the whole battery of other tests...