It’s definitely a bad idea to exercise wearing one.
The infuriating thing about this is the inability of some people to understand that there are no risk-free actions, or to accuse people who think that destroying the economy is sort of a bad idea of wanting grandma to die. They act like children.
[Update early afternoon]
The uncertainties of mask use demand that no one be forced to wear them.
I think a lot of people who lived their lives in a quivering state of imminent ecological collapse-panic have moved those emotions from that box into this one, and feel energized because the dread now seems even more imminent, and they have Science! on their side, and their enemies are all the right enemies, and this time they can make a difference. And it requires nothing.
I could get the Wuhan Virus (I call it that to push back against Newthink that insists the smart people call it the European Virus) and I could die. I know that. I keep that in mind all the time when I leave the house, and gather my tools and shields, and mind my actions with care, for the same reason I signal a lane change on an empty highway. You never know what’s in your blind spot
I find few things more annoying than morons who couldn’t integrate a function or even solve a quadratic equation to save their lives telling me that if I disagree with them on climate, or anything, that I am “denying science.”