脉阳濡弱。阴弦紧。更遇湿气。变为瘟疫。
温病汗不出。出不至足者死。厥逆汗自出。脉坚强急者生。虚软者死。
一论天行瘟疫传染。
凡患瘟疫之家。将出病患衣服于甑上蒸过。则一家不染。若亲戚乡里有患瘟疫。欲去看
问。先将清油抹鼻孔。任进候。出外又将纸捻于鼻内。探取喷嚏三五个。则不染。
一论瘟疫之气。令人不相传染。瘟病及伤寒。用
屠苏酒 （屠苏是羽帐名。丰贵之家。正月眷属会羽帐之中。饮此酒以辟瘟疫邪气。）
大黄（十五铢） 白术（十铢） 桔梗（十五铢） 川椒（十五铢炒出汗六钱二分） 防风（六
铢） 乌头（六铢） 桂枝（十五铢） 菝契（六铢即古之二钱半二十四铢为一两）
上 咀。绛囊盛。以十二月晦日早。悬沉井中至泥。正旦平晓。出药置酒中。屠苏之东
向户中饮之。屠苏之饮。先从小起。多少自在。饮药酒三朝。还置井中。当家内外。并皆
着药。辟瘟疫也。忌猪肉生葱桃李雀肉等物。
一宣圣辟瘟方。
用腊月二十四日井花水。在平旦第一汲水。盛净器中。量人口多少。浸乳香。至岁旦五
更暖令温。从小至大。每人用茶杯盛一小块。饮水一二呷咽下。则一年不患疫。
一论瘟疫之病。皆是大热之症。不可妄用热药。
一治瘟疫不相传染。方用小赤豆。以新布袋盛。入井中。浸二日。与家人各服二十一粒
辟秽丹
乳香 苍术 细辛 甘松 川芎 真降香
上为末。烈火焚之。疫邪远辟。
一九味羌活汤。治瘟疫初感。一二日间服之。取汗而愈。其效如神。
一论众人病一般者。天行时疫也。其症头面肿大。咽喉不利。舌干口燥。憎寒壮热。时
气流传。不问四时瘟疫。通用此方。
加减败毒散
防风（一钱五分） 荆芥（二钱） 羌活（二钱） 独活（二钱） 前胡（二钱） 升麻（五分）
干葛
（一钱） 赤芍（二钱） 桔梗（八分） 川芎（一钱五分） 白芷（二钱） 薄荷（八分） 牛蒡子（
三钱） 甘草（八分） 柴胡（八分）
上锉。姜、葱煎。热服出汗。
一论时毒。头面红肿。咽嗌堵塞。水药不下。若素有脏腑积热。发为肿毒疙瘩。一切恶
毒。红肿而痛。宜此方。
漏芦汤
漏芦（二钱） 升麻（一钱五分） 玄参（一钱） 牛蒡子（一钱） 连翘（一钱） 桔梗（一钱）
黄芩（酒洗一钱五分） 大黄（酒浸） 甘草（各一钱） 蓝叶（二钱半如无以青黛五分代之）
上锉一剂。水煎。温服。大便实。加芒硝一钱。
一治大头瘟病。额大项肿。
八圣散 大尹许即洲传。
黄芩 黄连 黄柏 蒲黄（各五钱） 雄黄 蛇蜕（炒） 鸡内金 白丁香（各二钱）
上为末。每服一钱。用蓝靛根煎汤送下。
The pulse presents as weak and soggy in the Yang position, and wiry and tight in the Yin position. If exposed to dampness, it transforms into plague (Yi Wen).
In warm disease (Wen Bing), if there is no sweating, or if sweating does not reach the feet, death ensues. In cases of cold extremities (Jue Ni) with spontaneous sweating, if the pulse is strong, firm, and rapid, survival is possible; if the pulse is deficient and soft, death ensues.
On the transmission of seasonal plague:
In households where plague has occurred, steaming the patient's clothes on a steamer basket prevents infection within the family. When visiting relatives or neighbors suffering from plague, apply clear sesame oil inside the nostrils to allow the qi to enter. Upon returning, insert a twisted paper wick into the nose to induce three to five sneezes, thereby preventing infection.
Regarding methods to prevent mutual transmission of plague qi: For treating warm disease and cold damage (Shang Han), use Tusu Wine. (Note: Tusu refers to a feather tent. Wealthy families gather their households within these tents during the first month to drink this wine to ward off plague pathogens.)
Ingredients: Rhubarb Root (Da Huang, 15 zhu), Atractylodes Macrocephala Rhizome (Bai Zhu, 10 zhu), Platycodon Root (Jie Geng, 15 zhu), Sichuan Pepper Fruit (Chuan Jiao, 15 zhu, stir-fried until moisture evaporates, approx. 6 qian 2 fen), Saposhnikovia Root (Fang Feng, 6 zhu), Aconite Lateral Root Preparata (Wu Tou, 6 zhu), Cinnamon Twig (Gui Zhi, 15 zhu), Smilax Glabra Rhizome (Ba Qian, 6 zhu; note: ancient measurement 2.5 qian = 24 zhu = 1 liang).
Chop the herbs, place them in a red silk pouch, and suspend the pouch at the bottom of a well in the mud early on the last day of the twelfth lunar month. On the morning of the first day of the new year, retrieve the herbs and place them in wine. Drink the Tusu Wine facing the eastern door, starting with children; the quantity is flexible. After drinking for three days, return the bottle to the well. All members of the household should consume this medicine to ward off plague. Avoid pork, raw green onions, plums, peaches, and sparrow meat.
Sage Xuanyuan's Plague-Repelling Formula:
Use well water drawn at dawn on the 24th day of the twelfth lunar month. Place it in a clean vessel and soak Frankincense Resin (Ru Xiang) according to the number of people. On New Year's Eve at the fifth watch, warm the liquid slightly. From youngest to oldest, each person drinks one small piece held in a teacup, swallowing one or two sips, ensuring immunity from epidemic diseases for the year.
On the nature of plague diseases: Plagues are all severe heat syndromes; hot-natured medicines must not be used recklessly.
To prevent mutual transmission of plague: Use small red adzuki beans. Place them in a new cloth bag and soak in a well for two days. Each family member takes 21 pills of "Bi Hui Dan" (Plague-Repelling Pill).
Ingredients of Bi Hui Dan: Frankincense Resin (Ru Xiang), Atractylodes Rhizome (Cang Zhu), Asarum Root (Xi Xin), Nardostachys Root (Gan Song), Ligusticum Chuanxiong Rhizome (Chuan Xiong), Agarwood (Zhen Jiang Xiang).
Grind into powder. Burn fiercely with fire to repel epidemic pathogens.
Jiu Wei Qiang Huo Tang: Treats initial contraction of plague. Administer within one to two days to induce sweating and cure. The effect is miraculous.
On symptoms affecting many people similarly: This is seasonal plague (Tian Xing Shi Yi). Symptoms include swelling of the head and face, throat obstruction, dry tongue and mouth, aversion to cold with high fever, and spread of seasonal qi. This formula is universally applicable regardless of the season.
Modified Baidu San (Dispel Toxin Powder):
Ingredients: Saposhnikovia Root (Fang Feng, 1.5 qian), Schizonepeta Spike (Jing Jie, 2 qian), Notopterygium Rhizome (Qiang Huo, 2 qian), Angelica Pubescens Root (Du Huo, 2 qian), Peucedanum Root (Qian Hu, 2 qian), Cimicifuga Rhizome (Sheng Ma, 0.5 qian), Kudzu Root (Ge Gen, 1 qian), Red Peony Root (Chi Shao, 2 qian), Platycodon Root (Jie Geng, 0.8 fen), Ligusticum Chuanxiong Rhizome (Chuan Xiong, 1.5 qian), Angelica Dahurica Root (Bai Zhi, 2 qian), Mint Leaf (Bo He, 0.8 fen), Arnebia Seed (Niu Bang Zi, 3 qian), Licorice Root (Gan Cao, 0.8 fen), Bupleurum Root (Chai Hu, 0.8 fen).
Cut into pieces. Decoct with ginger and scallion. Take hot to induce sweating.
On seasonal toxins: Swelling and redness of the head and face, throat blockage preventing intake of water or medicine. If there is pre-existing internal heat in the zang-fu organs manifesting as toxic swellings or nodules, and all malignant sores presenting with redness, swelling, and pain, use this formula.
Lou Lu Tang:
Ingredients: Rhapontic Rhizome (Lou Lu, 2 qian), Cimicifuga Rhizome (Sheng Ma, 1.5 qian), Scrophularia Root (Xuan Shen, 1 qian), Arnebia Seed (Niu Bang Zi, 1 qian), Forsythia Fruit (Lian Qiao, 1 qian), Platycodon Root (Jie Geng, 1 qian), Scutellaria Root (Huang Qin, washed with wine 1.5 qian), Rhubarb Root (Da Huang, soaked in wine), Licorice Root (Gan Cao, 1 qian each), Isatis Leaf (Lan Ye, 2.5 qian; substitute with Indigo Naturalis Qing Dai 0.5 fen if unavailable).
Cut one dose. Decoct in water. Take warm. If stool is hard, add Mirabilite (Mang Xiao, 1 qian).
Treating Da Tou Wen (Big Head Plague): Swelling of the forehead and neck.
Ba Sheng San (Eight Sages Powder): Passed down by Grand Administrator Xu Jizhou.
Ingredients: Scutellaria Root (Huang Qin), Coptis Rhizome (Huang Lian), Phellodendron Bark (Huang Bai), Polygonum Multiflorum Seed (Pu Huang, 5 qian each); Realgar (Xiong Huang), Snake Slough (She Tui, stir-fried), Chicken Gizzard Membrane (Ji Nei Jin), White Starling Dropping (Bai Ding Xiang, 2 qian each).
Grind into powder. Take 1 qian per dose, administered with decoction of Indigo Root (Lan Dian Gen).