Do some research wrote:
Oh dear. Moron alert. The cold virus; when exposed to it; lives in your nasal passage. When this area becomes cold, this triggers the virus into becoming your full-on cold. Keeping warm, ideally your nose, reduced the chances of this virus developing. So, the keeping warm and wrapped up thing, and in particular - staying out of cold rain - works! You're welcome.
I assume by moron you mean yourself.
YOU'LL GET SICK IF DON'T WEAR A COAT
George Bailey from It’s a Wonderful Life earned a punch in the nose over this one, but would Zuzu really have stayed healthy if her teacher had buttoned her coat? Not likely.
Colds and flu are caused by viruses. They do circulate during cold-weather seasons, but you're more likely to pick them up inside than out. In fact, going outside and getting more physical activity—and not just during cold and flu season—may help prevent sickness.