瘟疫一症，古无专书，不过微见其意于伤寒书中。世人咸熟读伤寒，以为百病俱不外于六经，讲明
伤寒，余症悉可类推。不知瘟疫四时皆有，伤寒惟冬至后间或有之，是伤寒甚少，而瘟疫十居八九。伤寒
是寒，瘟疫是热，其感受施治有霄壤之分。若以伤寒方治瘟疫，罔不毙者，此吴又可先生《瘟疫论》所
以作也。由是杜清碧、马长公、景松崖、戴天章、熊恁昭诸君继起，宗仰吴氏，各出手眼，推阐发明，着
有成书，瘟疫一门于斯详备，活人实多。予总角时，即蒙庭训，留心医道，每遇疫症，往往幸中，惟值
瘟疹，遵用成方，未能悉见效验，心窃疑之。甲子秋，得乡前辈余师愚先生《疫疹一得》，谓疫乃无形之
毒，宜用石膏，不宜用硝、黄等语，卓识尤在吴、杜诸君子上，予茅塞顿开，珍如拱璧，以之治疫与
疹，奏效尤多。近年需次芦鹾，见误于此症者不一而足，偶语契好诸君子，咸谓此书不宜独秘，遂
助金付梓，以广其传。或师愚先生寿世苦心，实有以自寿故耶！较予一手之奏效，自相去远矣。此书用
药过重，予每临症，或暂去一、二味，或大减分量。即如石膏，或 用，或生用，由三、五钱以至二、三
两，无不应手辄效。惟书中谓伤寒有耳聋，瘟疫无耳聋一条，系千虑之一失。予每见瘟疫亦有耳聋，以其
方治之，亦极神效。阅是书者，幸无以此一语，印定耳目，想知者亦必有以辨之。是为序。
时道光戊子岁七月既望长芦候补盐运司知事毗陵庄锦制亭氏书于津门旅次
瘟疫这一病症，古代没有专门的著作，只是在伤寒类的书中略微提及其中的一些意旨。世人都熟读《伤寒论》，认为所有疾病都不超出六经的范畴，只要讲明白了伤寒，其余的病症都可以类推出来。他们不知道瘟疫一年四季都会发生，而伤寒只有在冬至之后偶尔才会出现，这说明伤寒很少见，而瘟疫占了十之八九。伤寒是由寒邪引起的，瘟疫是由热邪引起的，它们致病的原因和治疗方法有着天壤之别。如果用治疗伤寒的方子来治疗瘟疫，没有不导致病人死亡的，这就是吴又可先生撰写《瘟疫论》的原因。从此以后，杜清碧、马长公、景松崖、戴天章、熊恁昭各位先生相继兴起，尊崇仰慕吴氏的观点，各自施展独到的见解，推演阐发其中的道理，著成了有成就的书籍，使得瘟疫这一门类的知识在此时变得详细完备，救活的人实在很多。我年幼时，就接受父亲的教诲，留心医学之道，每次遇到疫病，往往侥幸治愈，只是遇到瘟疹（出疹性的瘟疫）时，遵循使用现成的方剂，不能全部见效，心里对此感到怀疑。甲子年秋天，得到同乡前辈余师愚先生的《疫疹一得》，书中说疫病是无形之毒，适宜用石膏，不适宜用芒硝、大黄等药，这种卓越的见识尤其超过吴又可、杜清碧诸位先生，让我茅塞顿开，像对待拱手之玉一样珍视它，用它来治疗疫病和疹病，奏效特别多。近年来我在长芦盐运司候补任职，看到因误治此症而死的人不计其数，偶然与知己朋友们谈论此事，大家都说这本书不应该独自保密，于是大家资助金钱刻印此书，以广泛流传它。或许师愚先生造福世人的苦心，确实是因为他自己长寿的缘故吧！这比起我一个人手到病除的效果，相差就远多了。这本书用药剂量较重，我每次临证诊治，有时暂时去掉一两味药，或者大幅减少分量。就像石膏，有时煅用，有时生用，用量从三、五钱到二、三两，没有不随手见效的。只有书中说“伤寒有耳聋，瘟疫无耳聋”这一条，是我千虑中的一失。我每次见到瘟疫患者也有耳聋的症状，用书中的方子治疗，也极其神效。阅读这本书的人，希望不要因为这一句话就固定了视听，懂得医理的人一定会有所辨别。这就是序言。
时在道光戊子年七月十六日，长芦候补盐运司知事、毗陵人庄锦制亭，书写于天津的旅舍中。
The disease of epidemic plague (Yiwen) had no specialized monographs in ancient times; its principles were merely briefly alluded to in texts on Cold Damage (Shanghan). People generally studied *Shanghan Lun* thoroughly, believing that all diseases fall within the framework of the Six Meridians (Liujing), and that once Shanghan is understood, other ailments can be deduced by analogy. They fail to realize that epidemics occur throughout all four seasons, whereas cold damage occurs only occasionally after the Winter Solstice. Thus, cold damage is rare, while epidemics account for eight or nine out of ten cases. Cold damage is caused by cold pathogens, while epidemics are caused by heat pathogens; their modes of transmission and treatment differ as much as heaven and earth. If one uses formulas for cold damage to treat epidemics, death is inevitable. This is why Mr. Wu Youke wrote *Wen Yi Lun* (Treatise on Pestilence). Since then, Mr. Du Qingbi, Ma Changgong, Jing Songya, Dai Tianzhang, and Xiong Nenzhao successively rose to prominence, revering Wu’s views and offering their own unique insights, elaborating and clarifying the theories, and producing accomplished books. Consequently, the study of epidemics became detailed and comprehensive, saving countless lives. In my childhood, I received paternal instruction and devoted myself to medical arts. Whenever I encountered epidemic diseases, I was often fortunate to succeed. However, when dealing with epidemic rashes (Wenzhen), relying solely on established formulas did not always yield effective results, which caused me inner doubt. In the autumn of the Jiazi year, I obtained *Yi Zhen Yi De* (One Gain from Epidemic Rashes) by my senior fellow townsman, Mr. Yu Shiyu. The book states that epidemics are invisible toxins, suitable for treatment with Gypsum (Shigao), but unsuitable for Cathartics such as Mirabilite (Xiaoshuo) and Rhubarb (Dahuang). This profound insight surpassed that of Mr. Wu and others, opening my mind like a blocked path. I cherished it like a precious jade artifact. Using it to treat epidemics and rashes yielded frequent success. In recent years, while serving as a candidate official at the Changlu Salt Administration, I witnessed numerous deaths due to misdiagnosis and mistreatment of this condition. Upon discussing this with close friends, they unanimously agreed that this book should not be kept secret. Thus, we contributed funds for its publication to ensure its wide dissemination. Perhaps Mr. Shiyu’s diligent efforts to benefit the world were indeed the cause of his own longevity! Compared to my individual successes, the impact of this book is far greater. The dosages in this book are heavy; upon clinical application, I sometimes temporarily omit one or two herbs or significantly reduce the dosage. For instance, Gypsum may be calcined or used raw, with dosages ranging from 3-5 qian to 2-3 liang, yielding immediate effects in every case. The only exception is the statement in the book: "Cold damage presents with deafness, but epidemics do not." This was a minor oversight in an otherwise thorough analysis. I have frequently observed patients with epidemics presenting with deafness, and treating them with the formulas in the book proved extremely effective. Readers of this book are advised not to let this single statement limit their perspective; those knowledgeable in medicine will surely be able to discern the truth. This serves as the preface.
Written in the guest quarters of Tianjin on the sixteenth day of the seventh month in the Wuzi year of the Daoguang reign, by Zhuang Jin, courtesy name Zhiting, from Piling, Candidate Official of the Salt Administration at Changlu.