TRANSCRIPT:
GREENHALGH: "So there's no doubt that there is a danger there. I do agree that wet soggy masks are not a good idea, but for goodness sake, I've been for a run this morning. Not only did I put my T-shirt in the wash, but I put my mask in the wash as well. So the fact that they get contaminated is not a reason for not wearing them. It's not that you're going to do anything with that mask apart from wash it. The other thing to say is that 40 percent of COVID cases happen by catching it from people who have no symptoms, so you're jogging along, you think you're fine, and then the next day you develop symptoms of COVID, but you've actually breathed that COVID onto someone, perhaps an old lady walking the dog or something like that. So I think it's really important to be socially responsible."