Health and medicine

Definition  : The common cold is a viral infection of your upper respiratory tract — your nose and throat. A common cold is usually harmless, although it may not feel that way at the time. If it's not a runny nose,  sore throat  and cough, it's the watery eyes, sneezing and congestion — or maybe all of the above. In fact, because any one of more than 100 viruses can cause a common cold, signs and symptoms tend to vary greatly. Preschool children are at greatest risk of frequent colds, but even healthy adults can expect to have a few colds each year. Most people recover from a common cold in about a week or two. If symptoms don't improve, see your doctor. Symptoms  : Symptoms of a common cold usually appear about one to three days after exposure to a cold-causing virus. Signs and symptoms of a common cold may include: -Runny or stuffy noseI -Itchy or sore throat -Cough -Congestion -Slight body aches or a mild headache -Sneezing -Watery eyes -Low-grade fever -Mild