This is really important!
This is valid for every bacteria and virus. When the canals in your head dry out, it’s much easier to infect yourself with something. Especially in winter, when the air is cold, it’s also much drier.
This is also important for those who use air conditioners, as they tend to dry out the air in rooms. That’s why people in iran, for example, despite high temperatures, are getting quite easily infected.
I just want to help. Most people around me aren’t aware of this rather simple way of increasing the odds in their favours.
For those, who don’t know how to raise the humidity: Everything wet helps. It does not need to be hot or steamy, but that helps even more. As long as the air is dryer than, for example, a wet cloth, the air will pull the water out of it. Big sheets of hot water will raise humidity, but please don’t put ten steaming wet sheets into a single room, because too much humidity isn’t great either. You’ll notice early enough.
Official suggested levels for humidty for humans are 45%-55%. There is no harm raising it up a notch, ignoring these numbers and simply checking your nose. If your nose is more dry than wet, then humidity simply is too low, no matter what anyone says. If you’re unaware of what to classify as “too dry” then grab a piece of toilet paper, fold it properly, put it in hot water and put it into your nose. You’ll understand it from experience.
Also, when you need to go outside and it’s cold, put wet cloth into your nose holes. That’ll prevent the dry air from sucking the liquid out of your head and will help keeping the liquid inside. It makes a difference!
And don’t breathe through your mouth when outside.
Good Luck, mates. o7