Why are we told that cold weather or beverages can cause sickness when sickness is caused by bacteria or viruses.
In: Biology
Your mouth and nose, already has the bacteria and viruses in them.
Most of the time, it’s fine, and they can’t get into your body proper, to reproduce and make you sick.
But when it’s cold, it’s generally dry/not humid air.
Plus most indoor heating systems are very dry.
Your mucus membranes in your mouth and nose dry out, and create an opening for bacteria to invade.
So, in the winter, stay hydrated, and maybe run a humidifier in your bedroom so you don’t dry out overnight.
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