A virus causes the common cold. These rhinoviruses are transmitted from person to person or by touching an object that has been handled by someone with the cold virus. The virus is present in the body for several days before symptoms begin to appear. Antibiotics are not effective. Lots of rest and fluids are important to help the body fight the virus. Use a handkerchief or tissue when sneezing or coughing. Frequent hand washing also helps prevent the spread of the common cold. Keep your child at home if his temperature is above 100 degrees, he is vomiting or has flu symptoms - body aches, fever and headache.