The common cold is a mild viral infection that primarily affects the upper respiratory system. It is caused by various viruses, with the rhinovirus being the most common culprit. Symptoms typically include a runny or stuffy nose, sore throat, cough, and sometimes a mild fever. While it can be annoying, the common cold usually resolves on its own within a week or two. To prevent catching a cold, it's important to practice good hygiene, such as washing your hands frequently and avoiding close contact with sick individuals. While there is no cure for the common cold, over-the-counter medications can help relieve symptoms and make you feel more comfortable during recovery.