What is a common cold?

We’ve all had a common cold at one point or another. What is it and why do we get colds? How do they work? Nothing seems to be a consensus. And does it having anything to do with the flu?

What is a cold?

and does being cold make you sick?

or as understood by Bite Sci-zed:

and how can we cure it?

Do any common remedies work? Probably not. And definitely not vitamin C!