A virus is too small to be stopped by a mask, but somehow a carbon dioxide molecule is big enough to cause carbon dioxide build up.
That’s the logic I get told by anti-maskers even though that makes no sense to me if you are going purely by size. See scale below.
Of course the real problem is droplets of moisture that actually have many virus particles within them. A droplet tends to be more than 5,000 nm in size. Do masks stop droplets? They definitely reduce them.
Why in the world am I talking about this? Because people keep bringing it up. Obviously I’m not expert. I’m just of the opinion that we should probably listen to the experts on this one. Not the internet researchers like myself. Hey look it’s a Oklahoma mask study suggesting “that government mandates may play a role in reducing transmission of SARS-CoV-2, and other infectious respiratory conditions.”
Charlie's Place 