From a medical encyclopedia:
Colds are caught from germs, not wet hair, wearing coats or not...
We call it the “common cold” for good reason. There are over one billion colds in the United States each year. You and your children will probably have more colds than any other type of illness. Children average three to eight colds per year. They continue getting them throughout childhood. Parents often get them from the kids. Colds are the most common reason that children miss school and parents miss work.
Children usually get colds from other children. When a new strain is introduced into a school or day care, it quickly travels through the class.
Colds can occur year-round, but they occur mostly in the winter (even in areas with mild winters). In areas where there is no winter, colds are most common during the rainy season.
When someone has a cold, their runny nose is teeming with cold viruses. Sneezing, nose-blowing, and nose-wiping spread the virus. You can catch a cold by inhaling the virus if you are sitting close to someone who sneezes, or by touching your nose, eyes, or mouth after you have touched something contaminated by the virus.
People are most contagious for the first 2 to 3 days of a cold, and usually not contagious at all by day 7 to 10.
