Why Do Humans Get Sick When It's Cold?

Cold weather doesn’t actually make you sick, but it helps viruses get into your body more easily. Think of it like a cold wind that pushes the virus toward your nose and throat, which are the first places to meet the germs. Once inside, those germs might cause you to feel sick, like having a cold or flu. It’s kind of like how a door opens wider when there’s more wind outside, it makes it easier for sneaky viruses to come in.