Use the text to put the events in order. Over two hundred different viruses can cause the common cold. Cold viruses travel through the air in tiny water droplets and enter your nose or mouth. There, they attack the cells in the inner lining of your nose and throat. Within two days, the lining begins to produce mucus, or snot. Little hairs inside your nose, called cilia, sweep the mucus down your throat, which can also become infected. Your body's natural defenses eventually kick in and attack the infection, and you start getting better.