Viral particles can be emitted every time an infected person breathes, but especially if their breathing is deep (such as when exercising) or involves vocalisation (such as speaking or singing). COVID case rates are higher than they've ever been and hospitalisation rates are once again rising rapidly in many countries.Against this bleak picture, we yearn to get back to normal. We'd like to ride on a bus, sing in a choir, get back to the gym, or dance in a nightclub without fear of catching COVID.SARS-CoV-2, the virus that causes COVID, spreads mainly by airborne transmission. If you are outdoors, the space is almost infinite, so the virus doesn't build up in the same way. Gather together with lots of people in an enclosed space with poor air quality, such as an under-ventilated gym, nightclub or school classroom2.

Source: Economic Times January 12, 2022 21:55 UTC