How does Chinese medicine explain infectious diseases? The theory of western medicine is virus infection, but there is no such thing as virus and bacteria in Chinese medicine.

Plague in traditional Chinese medicine should be similar to infectious diseases in modern medicine, and one of the pathogenic factors causing plague is plague. Plague is one of exogenous pathogenic factors. Diseases with similar clinical manifestations caused by epidemic pathogens or epidemic gases that harm people and infect each other are also called epidemics, that is, acute infectious diseases. For example, as Su Wen said, "When the five epidemics come, no matter how big or small, they are all susceptible to each other and have similar symptoms", which is highly contagious. For example, sui's treatise on febrile diseases records that "people get sick because of their bad temper, and then they get sick because of their anger." Its spread is related to serious abnormal climate (such as long-term drought, flood, extreme heat, wet fog and miasma), environmental pollution and poor sanitary conditions. Most of the infections are pathogenic toxins of damp heat, which enter from the nose and mouth, pass through the Wei, Qi, Ying and blood to the viscera. Therefore, it is the easiest to turn fire into yin and consume blood, while if heat passes through pericardium, it will cause delirium, convulsion, forced blood and other symptoms. The nature and pathogenic characteristics of the plague: 1, the heat toxin is flourishing; 2. Highly contagious and easily popular; 3. Similar symptoms and high mortality; 4. Specificity of disease location and disease type. Different epidemics are caused by different pathogens. Factors affecting the occurrence and epidemic of plague: 1, climatic factors; 2. Environment and food hygiene; 3. Whether preventive isolation is appropriate; 4. Social factors. The above theories are for reference only. Please refer to TCM reference books, TCM basics, TCM diagnostics, as well as ancient books, syndrome differentiation and so on.