Why do people get sick more often in the winter?

Being cold reduces your body’s resistance to germs.

Your body needs to be maintained at a temperature of around 37 degrees celsius. Although I don’t know how the exact mechanism works, my hypothesis is that when your body temperature is in danger of being lowered, your body works much harder to keep it at 37 degrees (hence shivering and what not). It spends a lot more energy than it needs to. And the thing is that this coldness isn’t only for a few hours, it’s for a period of months. All this energy spent on protecting your body from the cold probably lowers its resistance to other pathogens.

Try sitting in front of an air conditioner after your shower in the summer, you’ll probably get sick too.

When its cold, the average person doesn’t want to be out in sub-zero weather, so people cram inside. This puts people in close contact for longer periods of time with one another…and that makes the spreading of germs easier.

I asked this quite a while ago.
Check out Doctor shilolo’s response and you’ll have your answer.

your all forgetting that most viruses SURVIVE alot longer in cold temperatures. hence, more colds, longer periods of having a cold.

Body physiology changes.