Whether you associate humidity with illnesses or not, it's important to note that it’s easier for viruses to stay airborne longer when the indoor relative humidity is low. Data from the Asthma ...

The U.S. Environmental Protection Agency (EPA) says that ideal indoor humidity levels should be between 30 percent and 50 percent. Some research suggests that the ideal relative humidity for ...

Ideally, you want a relative humidity in a sweet spot of more than 30% and less than 60%. After many hours of testing, CR recommends the Vicks humidifier for smaller rooms, it's around $36.