Neat News 1850 (added 2021-01-23)
Humid air against Covid-19?

Public Domain by Daniel FR
One way to reduce the number of Covid-19 particles in the air is to increase the relative humidity. The number of particles in the air halves at 10 degrees Celsius and 40 percent relative humidity after 24 hours, but after only 90 minutes at 27 degrees Celsius and 65 percent relative humidity.
related: #Covid_19 #humidity