And "Lu Chunqiu Ji Chun Ji" records: "Ji Chun is prosperous in Xia Zhishi, and the people are suffering from diseases and epidemics."
That is to say, when the climate is abnormal, such as summer, the temperature rises and the humidity increases, and epidemics are easy to break out. Therefore, cold in winter is actually conducive to killing or controlling the spread of germs, and cold is healthier. Su Wen and acupuncture theory in Huangdi Neijing said: "All five epidemics are susceptible to infection." Described the infectious characteristics of the plague.
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Huangdi Neijing is divided into Lingshu and Suwen, which is the earliest medical classic in China and one of the four classic works of traditional medicine (the other three are Difficult Classic, Treatise on Febrile Diseases and Shennong Herbal Classic).
Huangdi Neijing is a comprehensive medical work, which establishes the theories of Yin and Yang, five elements, pulse condition, Tibetan image, meridians, etiology, pathogenesis, symptoms, diagnosis, treatment, health preservation and luck.
Discussing medicine in a holistic view presents a "holistic medical model" of nature, biology, psychology and society (according to the research of modern scholars, it is considered that the traces of Huang family in this edition are invaded by Taoist priests in Sui and Tang Dynasties). Its basic material comes from the long-term observation of life phenomena in ancient China, a lot of clinical practice and simple anatomical knowledge.
Huangdi Neijing laid the foundation of human physiology, pathology, diagnosis and treatment. It is a medical work with great influence in China and is called the medical ancestor.