There is only one disease called common: the common cold. We call it the common cold because every year millions of people catch it. Everybody knows the symptoms: a runny nose, a slight fever, coughing and sneezing. It is very unpleasant, but nobody knows a cure. At the drugstore, there are usually shelves with cold ' cures '. These medicines don't cure a cold, but they do relive the symptoms. Whatever you do, your cold will last for a few days and then disappear. How can you help prevent a cold? Eat well, exercise and you will be fit and healthy.