《黄帝内经·素问·疟论》
所以，医生不能在疟疾发病的时候进行治疗，就是因为此时正当正气和疟邪交争逆乱的缘故。黄帝道：讲得好！
故工不能治其已发，为其气逆也。帝曰：善。
Therefore, doctors cannot treat malaria when it manifests, because this is when the righteous qi and the malaria pathogenic factor are fighting and in chaos. The Yellow Emperor said: Well spoken!