The right lung is more susceptible to infection than the left lung in relation to the anatomy of the bronchi. After the trachea enters the chest cavity, it is divided into the left and right main bronchial tubes. The left main bronchial tube is more slender than the right main bronchial tube, the direction is more inclined, and the angle with the trachea is smaller, while the right main bronchial tube is more stout and shorter, and the direction is straighter than that of the left main bronchial tube, and the angle with the trachea is larger, therefore, germs that are caused by infection through the trachea are more prone to enter into the right lung, and cause the infection of the right lung. The human body in the respiratory process, the external environment of organic or inorganic dust, including a variety of microorganisms, harmful gases, etc., can enter the respiratory tract and lungs to cause disease. Because of the anatomical differences between the left and right main bronchial tubes of the lungs, the right lung is more susceptible to infection than the left lung. If an infection occurs in either the left or the right lung, it is important to go to the hospital in a timely manner for standardized diagnosis and treatment.