Masks help protect you and others against SARS-CoV-2, the virus that causes COVID. You can check the hospital admission level in your county to decide whether you need to wear a mask. The CDC says ...
But nothing is capable of absorbing carbon monoxide. If I was a cyclist, I’d use an FFP3 mask – even though they are hot to wear and slightly cumbersome, so may take some getting used to.
Whether or not to wear a mask in public spaces has become a personal choice. However, Dr. Shapiro advises considering the environment. “Indoor, crowded settings, such as airplanes, airports ...