Viruses and bacteria are the two pathogens that cause the cause of fever in the body. There is generally some difference between the two causing the fever. For example, bacterial fever is usually such as redness and swelling of the tonsils or pharynx, pain is very pronounced, and there will be a runny nose, green-colored or yellow thick sputum, and the foci of infection are mostly scattered usually not in clusters. In more severe cases, antibiotics are needed to treat the condition, even intravenous drips are needed. In viral fever, the symptoms of nasal runny nose are usually more pronounced than those of the pharynx, which may be all clear, or sticky white nasal mucus, may be accompanied by diarrhea or conjunctival congestion, usually without thick sputum, and may occur simultaneously or successively in more than one person together, or in most people in a family together. In addition, these two diseases are very well differentiated in terms of blood tests. For example, in viral fever, elevated or decreased white blood cells, elevated lymphocytes, or elevated monocytes can be seen, whereas in bacterial fever white blood cells are elevated and neutrophils are elevated.