What are the causes of the common cold?
Many different viruses can cause the common cold. Each virus may have a slightly different pattern of symptoms and severity. Well over 100 types of cold viruses have been identified. Infection may be facilitated by excessive fatigue, emotional stress and other factors that weaken the body’s immune defenses. Bacteria and viruses are everywhere. They even live in the nose and throat and can gain a foothold when the body is physically or emotionally stressed.