The differences between viral and bacterial pneumonia are as follows: 1. Viral pneumonia, as the name implies, is an inflammation of the lungs caused by a virus, mostly manifested as an infiltration of the interstitial lung, commonly known as interstitial pneumonia. Bacterial pneumonia is also known as pneumonia caused by bacteria, the pathogenesis is not the same. Bacteria have cell walls, viruses do not. Common viruses are usually influenza virus, adenovirus, rhinovirus, respiratory syncytial virus, etc. Bacteria are mostly seen in Streptococcus pneumoniae, Pseudomonas aeruginosa, Haemophilus influenzae, etc.; 2. Clinical manifestations are not consistent, viral pneumonia generally has milder clinical symptoms and fewer signs. The symptoms of poisoning are relatively mild, with fever, cough, coughing up thick sputum, shortness of breath, dyspnea, chest tightness and other toxic reactions. However, if the patient’s basic condition is not good, such as combined with leukemia, combined with chronic malnutrition, combined with AIDS and other cases of physical weakness may appear serious lesions, which may lead the patient to endanger their lives. Therefore, viral pneumonia should not be taken lightly. For example, bird flu and SARS are actually caused by viral pneumonia. In bacterial pneumonia, the signs are also different. The signs of bacterial pneumonia are generally dry and wet rales in the lungs, while viral pneumonia has fewer dry and wet rales; 3. The means of pathogenic examination are different, as viruses are mainly difficult to isolate and culture, and are generally diagnosed with the help of nucleic acid tests and antibodies related to viruses. Bacterial pneumonia is mainly confirmed by culture and drug sensitivity tests, and the treatment is different. Viral pneumonia is mainly treated symptomatically, and there is no specific antiviral treatment. Bacterial pneumonia is mainly treated with antibiotics based on pathogenic tests.