《黄帝内经》邪气说并非指“气候异常变化”
Xieqi in Huangdi Neijing does not refer to “abnormal change of climate”

综合《黄帝内经》对邪气的认识，它们是一类特殊的物质，与季节气候相关，能够循着一定的路径 从外部侵入人体，附着在不同的部位导致不同的疾病，会对人体产生不同程度的损害，是卫气所防御对抗的主要 对象，具有外源性、侵袭性、损伤性、激发性等特点。这些证据已经足够说明“ 邪”的本质其实就是古人对各种 病原微生物的统称，并非指气候异常变化。
According to Huangdi Neijing, xieqi refers to the pathogenic factors which are special substances related to the seasonal climate. It can invade the human body via a certain path, attach itself to different parts of the body and induce different diseases. It can cause different degrees of damage to the human body. It is the main object that weiqi fights against for self-defense. Xieqi has the characteristics of being exogenous, invasive, damaging, stimulating immune system and so on. These evidences have been enough to explain that the essence of “xie” is the ancients’ general designation of the all kinds of pathogenic microorganisms rather than referring to abnormal change of climate