During the winter, when buildings are heated, the indoor humidity is often below 50 percent, providing a perfect environment for the flu to spread.
During the winter, buildings are heated and dry, exposing occupants to humidity levels way below 50 percent. Unfortunately, the flu virus thrives in that kind of environment where it can separate from airborne mucus from carriers and hover until it finds another host.
Conversely, the flu virus does equally well in humidity at 100 percent such as the rainy tropics. So much moisture offers a welcoming environment to the flu bug. Is there a prohibitive happy medium? Thankfully, yes.
The flu virus has a difficult time adhering to any mucus when the humidity levels are between 50 and 90 percent. By running a humidifier at home during the winter to create more moist conditions, you can make your home inhospitable to the bug, plus with your heater running you won't feel so dried out all the time.
Read more research done by Virginia Tech scientists here.