You can catch a cold if:
A person with a cold sneezes, coughs, or blows their nose near you. You touch your nose, eyes, or mouth after you have touched something contaminated by the virus, such as a toy or doorknob.
People are most contagious for the first 2 to 3 days of a cold. A cold is usually not contagious after the first week.
What causes Upper respiratory tract infection?
You can catch a cold if:
A person with a cold sneezes, coughs, or blows their nose near you. You touch your nose, eyes, or mouth after you have touched something contaminated by the virus, such as a toy or doorknob.
People are most contagious for the first 2 to 3 days of a cold. A cold is usually not contagious after the first week.