A good point made on the tube today: "If you tested negative to Covid yesterday you can still be positive today. It's like a pregnancy test, only good to the point in time when it's used."
And another. "You have the freedom to choose to use a mask, you don't have the freedom to expose other people if you chose not to use that mask."
And another. "You have the freedom to choose to use a mask, you don't have the freedom to expose other people if you chose not to use that mask."