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此图按铜人图尺寸，孩儿大小不等，宜因此类推。
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此刀锋宜尖薄利，约长寸许，外用玳瑁壳藏护。
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此象牙小簪约长寸许，两头宜尖利。
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痘何以曰牛也？痘之种自牛来也。外洋向无此疾，后由他处传染，患亦滋多，惟畜牛取
乳之家，独不沾染。医人欲穷其故，见牛乳旁有青蓝小 ，形与痘类，因悟牛之患痘必轻，
以之传人，必然无害，于是按古针刺法，取牛痘之浆，种人两臂消烁、清冷渊二穴，旬日，
果于所刺之处随出数颗，按日灌水，按日满浆，按日结痂落靥，无一损伤，无一复出。盖牛
土畜也，人之脾属土，以土引土，同气相感，同类相生，故能取效，若此，痘种自牛而来，
故曰痘也。
其曰引，何也？曰∶痘之为毒，受于先天，感于时气，散于经络。男女交感之会，先天
胎毒既有浅深。感时行之气，复有善恶。而散于经络分发五脏，又有轻重。正痘有发热即现
点者。最险之症，肾经之毒也，由肾而肝而心而肺而脾，传经最多，其症亦降序，故痘之发
毒，肾最重，脾最轻。按古痘苗塞鼻孔法，亦必五脏传遍，始能发热。缘鼻者，肺之外窍也
。苗塞鼻中，其气先传于肺，肺主皮毛。肺传于心，心主血脉。心传于脾，脾主肌肉。脾传
于肝，肝主筋。肝传于肾，肾主骨。痘毒藏骨髓之内，感苗气而发，其毒自骨髓尽达于筋，
肾脏之毒解矣。自筋尽达于肌肉，肝脏之毒解矣。自肌肉尽达于血脉，脾脏之毒解矣。自血
脉尽达于皮毛，心脏之毒解矣。自皮毛尽达于颗粒，肺脏之毒解矣。苗气必历五脏层递而入
，内毒亦必历五脏层递而出，此传送之次序也。今种牛痘法择于两臂中消烁、清冷渊二穴，
上下交连之处种之，似与塞鼻孔法有异。殊不知二穴部位乃手少阳三焦经也。三焦者，人身
最关要之腑，如天地之三元，总领五脏六腑、营卫、经络，通内外、左右、上下之气。三焦
通则内外、左右、上下皆通。得其关要之处引之，直从皮毛、血脉、肌肉、筋络同时直传而
入，使纵有胎毒深藏于肾，亦自然同时引其端绪，则无棼乱之忧。《金鉴》所谓∶引其毒于
未发之先者，即此意。张逊玉《种痘新书》所谓∶以佳苗而引胎毒，斯毒不横而症自顺者，
亦此意。故凡种痘皆用引法，而欲引毒从三焦经而出，则惟牛痘之法为最良也。
痘为小儿一大病，当天行时，人人尚思远避，今无故取婴孩而与之以病，可乎？曰∶非
也。譬之捕盗，乘其羽翼未成就而擒之甚易矣！譬之去莠，及其滋曼未延，芟而除之甚易矣
。人家小儿出痘，如遇险症，延医服药，举家日夕守视，多少酸辛，问卜求神，多少惊恐！
其轻者亦须多方调护。今牛痘则止种四颗或六颗，一儿嬉笑饮食一切如常，旬日之外，告厥
成功，无灾无害，不惟小儿省却疾苦，即育子者亦省却忧劳，法诚善也。
或问种牛痘有死者否？曰∶断无致死之理。予少时未出天花，详医为予种，时年三十
二
数
手
敢
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此图是按照铜人针灸图的尺寸绘制的，因为孩童的体型大小不一，应当根据这个标准进行类推。
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这把刀的刀锋应当尖锐、轻薄且锋利，长度大约一寸左右，外部用玳瑁壳制作护套来保护它。
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这支象牙小簪大约长一寸左右，两头都应当做得尖利。
为什么牛痘被称为“引痘”呢？因为痘毒的种子来源于牛。在外国原本没有这种疾病，后来从其他地方传染而来，患病的人也随之增多，只有那些饲养奶牛并挤奶的人家，唯独不沾染此病。医生想要探究其中的缘故，看到牛乳旁边有青蓝色的小斑点，形状与人类的水痘相似，于是领悟到牛感染痘症必然轻微，将其传播给人，必然不会造成伤害。于是按照古时的针刺方法，取牛痘的浆液，接种在人手臂上的消烁穴和清冷渊穴。十天左右，果然在针刺的地方长出几颗痘疹，每天注水，每天浆液饱满，每天结痂脱落，没有一处受损，也没有一处复发。大概是因为牛属于土畜，人的脾脏属土，以土引土，同气相求，同类相生，所以能够取得疗效。既然痘种来自牛，所以称为牛痘。
那为什么叫“引”呢？回答说：痘作为毒邪，受之于先天胎毒，感于时行疫气，散布于经络之中。男女交合之时，先天的胎毒既有深浅之分；感受时行之气，又有善恶之别；而散布于经络分发至五脏，又有轻重的差异。正常的痘疹有发热后立即现出斑点的。最危险的病症，是肾经的毒邪，由肾传肝，由肝传心，由心传肺，由肺传脾，传经最多，其症状也按顺序递减，所以痘毒发作时，肾脏最重，脾脏最轻。按照古代痘苗塞鼻孔的方法，也必须让五脏全部传遍，才能发热。因为鼻子是肺的外窍。痘苗塞入鼻中，其气先传于肺，肺主皮毛。肺传于心，心主血脉。心传于脾，脾主肌肉。脾传于肝，肝主筋。肝传于肾，肾主骨。痘毒藏匿于骨髓之内，感受到痘苗之气而发作，其毒邪自骨髓尽达于筋，肾脏的毒邪便解除了。自筋尽达于肌肉，肝脏的毒邪便解除了。自肌肉尽达于血脉，脾脏的毒邪便解除了。自血脉尽达于皮毛，心脏的毒邪便解除了。自皮毛尽达于颗粒（痘疹），肺脏的毒邪便解除了。痘苗之气必须历经五脏层层递进而入，体内的毒邪也必须历经五脏层层递出，这就是传送的次序。现在种牛痘的方法选择在手两臂中的消烁穴、清冷渊穴这两个穴位，在上下交接相连之处接种，似乎与塞鼻孔的方法有所不同。殊不知这两个穴位的部位属于手少阳三焦经。三焦，是人身上最关键的要腑，如同天地的三元，总领五脏六腑、营卫、经络，贯通内外、左右、上下的气机。三焦通畅，则内外、左右、上下皆通畅。得到这个关键之处加以引导，痘毒直接从皮毛、血脉、肌肉、筋络同时直接传入，即使有胎毒深藏在肾脏，也能自然同时引出其端绪，从而没有纷乱担忧。《医宗金鉴》所说的：“在毒邪未发之前引导它”，就是这个意思。张逊玉《种痘新书》所说的：“用好苗子来引导胎毒，这样毒邪就不会横逆而症状自然顺遂”，也是这个意思。所以凡是种痘都用引导的方法，而想要引导毒邪从三焦经排出，那么只有牛痘的方法是最好。
痘疹是小儿的一大重病，在当时流行期间，人们都想远远避开，现在无缘无故地让婴儿得病，可以吗？回答说：不是这样的。这就好比捕捉盗贼，趁他羽翼未丰时就擒获是非常容易的！又好比去除杂草，趁它蔓延未久时铲除是非常容易的。人家的小孩出痘，如果遇到险症，延请医生服药，全家日夜守候看护，有多少辛酸；问卜求神，有多少惊恐！即使是轻症也需要多方调护。现在种牛痘只种四颗或六颗，一个孩子嬉笑饮食一切如常，十天之外，宣告成功，无灾无害，不仅小儿省却了疾苦，养育孩子的人也省却了忧劳，这方法确实很好。
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This diagram is drawn according to the dimensions of the Bronze Man (Tongren) acupuncture model. Since children vary in size, one should infer and adjust accordingly based on this standard.
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The blade of this knife should be sharp, thin, and keen, approximately one cun in length, and protected externally by a casing made of hawksbill turtle shell (Daimao).
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This small ivory pin is approximately one cun in length, with both ends sharpened.
Why is cowpox referred to as "Yin Dou" (Induced Cowpox)? Because the seed of the pox originates from cattle. In foreign lands, this disease did not originally exist; it was later transmitted from other places, leading to an increase in cases. However, households that raise dairy cows for milk are uniquely immune to infection. Physicians sought to understand the reason and observed small blue-green spots near the cow's udder, resembling human smallpox lesions. They realized that if cattle contract the pox, the symptoms are mild. Therefore, transmitting it to humans would likely cause no harm. Following ancient needle-pricking methods, they took cowpox lymph and inoculated it into the Xiaoshuo (Xiaoshuo, Acupoint SI9) and Qinglengyuan (Qinglengyuan, Acpoint SI10) acupoints on the arms. Within ten days, several pustules indeed appeared at the pricked sites. Day by day, fluid accumulated, then filled with pus, followed by scabbing and falling off. There was no damage or recurrence. This is because cattle belong to the Earth element, and the human Spleen also belongs to Earth. Using Earth to attract Earth, resonating with similar Qi, and generating through similar categories leads to efficacy. Since the pox seed comes from cattle, it is called cowpox.
Why is it called "Yin" (Induction/Guiding)? The answer is: The poison of the pox is received from congenital factors (congenital toxin), influenced by seasonal epidemic Qi, and dispersed through the meridians. At the time of conception, congenital toxins vary in depth. The influence of seasonal epidemics varies in quality. Dispersal through meridians to the Zang organs varies in severity. Normal pox may show spots immediately upon fever onset. The most dangerous condition involves poison in the Kidney Meridian, transmitting from Kidney to Liver, to Heart, to Lung, to Spleen. This involves the most meridian transmissions, and symptoms decrease in order. Thus, regarding pox eruption, Kidney is heaviest, and Spleen is lightest. According to the ancient method of inserting pox material into the nostrils, all five Zang organs must be traversed before fever occurs. The nose is the external opening of the Lung. Material inserted into the nose transmits Qi first to the Lung, which governs skin and hair. Lung transmits to Heart, which governs blood vessels. Heart transmits to Spleen, which governs muscles. Spleen transmits to Liver, which governs sinews. Liver transmits to Kidney, which governs bones. Pox poison hides within bone marrow; sensing the Qi of the vaccine material, it erupts. The poison travels from bone marrow to sinews, resolving Kidney poison. From sinews to muscles, resolving Liver poison. From muscles to blood vessels, resolving Spleen poison. From blood vessels to skin and hair, resolving Heart poison. From skin and hair to granules (pustules), resolving Lung poison. The vaccine Qi must enter layer by layer through the five Zang organs, and internal poison must exit layer by layer through the five Zang organs. This is the sequence of transmission. The current cowpox inoculation method selects the Xiaoshuo and Qinglengyuan acupoints on the arms, where upper and lower parts connect. This seems different from the nasal method. However, these two acupoints belong to the Hand Shaoyang Sanjiao (Triple Burner) Meridian. The Sanjiao is the most critical Fu organ in the body, akin to the Three Origins of Heaven and Earth, commanding the five Zang and six Fu organs, Ying and Wei, and meridians, connecting internal and external, left and right, upper and lower Qi. When Sanjiao is unobstructed, internal/external, left/right, and upper/lower are all unobstructed. By guiding through this key point, the poison enters directly and simultaneously from skin, blood vessels, muscles, and sinews. Even if congenital poison is deeply hidden in the Kidney, its threads are naturally drawn out simultaneously, avoiding chaos. As stated in *Jin Jian* (Medical Standard): "Guiding the poison before it erupts." This is the meaning. As Zhang Xunyu stated in *Zhong Dou Xin Shu* (New Book on Smallpox Vaccination): "Using good vaccine to guide congenital poison, so the poison does not become rampant and symptoms naturally smooth out." This is also the meaning. Therefore, all smallpox inoculations use the induction method. To guide poison out via the Sanjiao Meridian, only the cowpox method is best.
Pox is a major illness for children. During epidemics, people try to avoid it. Is it right to intentionally give infants this disease? The answer is no. It is like catching a thief: it is easy to capture them while their power is not yet established. It is like removing weeds: it is easy to cut them when they have not yet spread. When a child gets pox, especially severe cases, doctors are summoned, medicine is taken, and the family guards day and night, enduring much sorrow. They consult fortune tellers and pray, facing much fear. Even mild cases require careful care. Now, cowpox inoculation uses only four or six pustules. The child plays, laughs, eats, and drinks as usual. After ten days, success is declared. There is no disaster or harm. Not only does the child avoid suffering, but parents are spared worry and labor. The method is truly excellent.
Someone asks: Are there deaths from cowpox inoculation? The answer is: Absolutely no possibility of death. When I was young, I had not contracted smallpox. I consulted physicians in detail to inoculate me. At that time, I was thirty-two years old...