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Humidity (best if between 50% and 80%)

James Lemon

Well-known member
Humidity (best if between 50% and 80%)
"It is assumed that temperature and humidity modulate the viability of viruses by affecting the properties of viral surface proteins and lipid membrane" [source] Relative humidity (RH, or Saturation Ratio: the state of vapor equilibrium in room air) affects all infectious droplets with respiratory viruses, independent of their source (respiratory tract or aerosolized from any fluid) and location (in air or settled on surfaces). Relative humidity therefore affects all transmission ways but has the most pronounced effect on airborne transmission. [source]

"Measurements of indoor humidities in 40 residential apartments in New York (19) and in 6 high-quality commercial buildings in the Midwest (20) showed indoor vapor pressure of below 10 mb or indoor RH of below 24% in the winter" [source]

Experiments conducted in a study indicated "a striking correlation of the stability of winter viruses at low RH (20–50%), while the stability of summer or all-year viruses enhanced at higher RH (80%)" [source]
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