5. Lung, Trachea, and Bronchus Cancer:
Cancer is a kind of sickness that makes the body cells to grow and expand in an abnormal way. The infection is able to spread from one body part to another. There are well over 100 types of cancer known to affect humans. The three most dangerous include the cancer of the lungs, the bronchus, and the trachea. It affects the respiratory system and interferes with many body functionalities. So far these types of cancer have killed more than 1.69 million people.