Maintain indoor humidity to limit airborne coronavirus

Keeping indoor humidity levels between 40% and 60% will help limit airborne transmission of the novel coronavirus by minimizing the presence of infectious viral droplets in the air, according to a new study. The authors said that as the amount of water vapor in the air rises, viral droplet size increases and the heavier droplets fall from the air more quickly, providing less chance for other people to inhale them and become infected. By contrast, when humidity is low, the virus-containing droplets dry out - but the small infectious virus particles survive, floating in the air for longer periods and increse the chnace of infection.