Keeping your home’s humidity in the 40% to 60% range could make it harder for flu viruses to spread.

Relative humidity measures how much moisture is in the air compared to how much it could hold at a given temperature. It is simply the dew point temperature divided by the air temperature, times 100.

The air inside your home does more than you might think. Whether it feels too dry in winter or too sticky in summer, indoor humidity plays a major role in your comfort, your health, and even the ...