下苗之日，必择成日开口栽种日，及天合天月二德日则吉，倘三者不能兼备，即
成开之日方可，若值人神所在之日，忌不可种。
种痘吉日 成日 开口 栽种日
天月二德日。 正五九月在丙。 二六十月在甲。 三七十一月在壬。 四八十二月
在庚。 人神所在之日。 十一日在鼻柱。 十五日在偏身。
种痘之在调摄最为紧要，自始至终，不可稍忽，如避寒热慎饮食是也，天气严寒
，盖覆宜温燰，勿使受寒，恐被寒气所触，则痘不得出，亦不可过于重绵叠褥，使热
。气壅滞，致痘不宣发，天气温暖，盖覆宜适中，恐客热与毒相并，致增烦热，亦不可
轻易着单露体，使寒邪外侵，阻遏生发之气，此寒热所以贵得其平也，人之气血，必
藉饮食生化，痘之始终，全赖乎此，若饮食亏少，气血何所资助乎，但不可过甚，若
过饮，则饮停不化津液，过食，则食滞必生痰热，所以吮乳之儿，不多乳不阙乳，能
食之儿，勿餐辛热炙传，勿啖粘硬生冷，勿恣意茶水，勿使饮凉浆，食不过饱，亦不
过饥，此饮食所以贵得其平也，至于寒热饮食之外，凡举止动作，既不可任意娇纵，
亦不可过于拂逆，惟在调摄之人，耐其性情，兢兢业业，善为保护，不但慎于既种之
后，且当慎于未种之先，不但慎之见苗之初，尤当慎之落痂之后，种痘者，宜谆谆告
诫，务其详细，使彼知关系匪轻，心存谨慎，如法调摄，始保万全，倘稍有不慎，以
致小儿或为寒热所侵，或为饮食所伤，咎将谁诿乎，此不知调摄者，所以断不可与种
也。
在接种牛痘（下苗）的日子，必须选择“成日”或“开口栽种日”，以及天德、月德吉日，这样才吉利。如果这三者不能同时具备，只要符合“成日”或“开日”即可；但如果遇到“人神”所在之日，则忌讳，不可接种。
种痘的吉日包括：成日、开口日、栽种日，以及天月二德日。
天月二德日的推算方法：正月、五月、九月在丙日；二月、六月、十月在甲日；三月、七月、十一月在壬日；四月、八月、十二月在庚日。
人神所在之日的规律：初十一日在人鼻柱部位，十五日在人偏侧身体部位。
种痘过程中的调摄护理最为紧要，从开始到结束，都不能有丝毫疏忽，例如避风寒、慎饮食等。天气严寒时，覆盖衣物应当温暖，不要让人受寒，恐怕被寒气侵袭，导致痘疹发不出来；但也不可用过于厚重的棉絮和褥子，以免热气壅滞，致使痘疹无法宣发透达。天气温暖时，覆盖衣物应当适中，恐怕外界的客气与体内毒邪相合，导致烦热加重；但也不可轻易穿得单薄裸露身体，使寒邪从外部侵入，阻碍生发之气，这就是为什么寒热的调节贵在保持平衡。人的气血，必须依靠饮食来化生滋养，痘疹的全过程，完全依赖于此。如果饮食摄入不足，气血从哪里得到资助呢？但是也不可以过量，如果饮水过多，则水饮停滞无法化为津液；如果进食过多，则食物停滞必然产生痰热。所以对于吸吮乳汁的婴儿，不应喂得太多，也不应喂得太少；对于能吃饭的孩子，不要吃辛辣燥热、炙烤煎炸的食物，不要吃黏腻坚硬、生冷之物，不要随意喝浓茶，不要让饮用冷饮凉浆。饮食不过饱，也不过饥，这就是为什么饮食的调节贵在保持平衡。至于除了寒热和饮食之外，凡是举止动作，既不可以任意娇惯纵容，也不可以过分违背其意愿。只在于负责调摄的人，要耐住孩子的性情，兢兢业业，善于保护。不仅要谨慎于接种之后，还要谨慎于接种之前；不仅要谨慎于见痘之初，更要谨慎于结痂脱落之后。种痘者应该谆谆告诫，务必详细，让他们知道关系重大，心存谨慎，按照方法调摄，才能保全万无一失。如果稍有疏忽，导致小儿或被寒热所侵袭，或被饮食所损伤，责任将推诿给谁呢？这就是不知道调摄的重要性，所以绝对不可以进行种痘的原因。
On the day of inoculation (inserting the variola vaccine), one must select a "Cheng" (Completion) day, a "Kai Kou Zai Zhong" (Opening Mouth and Planting) day, or days blessed by the Heavenly Virtue (Tiande) and Monthly Virtue (Yuede). This is auspicious. If these three conditions cannot be met simultaneously, selecting a "Cheng" or "Kai" (Opening) day is acceptable. However, if the day corresponds to the location of the "Ren Shen" (Human Spirit), it is taboo and inoculation must not be performed.
Auspicious days for smallpox inoculation include: Cheng days, Kai days, Zai Zhong days, and Tiande/Yuede days.
Calculation of Tiande/Yuede days: In the 1st, 5th, and 9th months, it falls on Bing days; in the 2nd, 6th, and 10th months, on Jia days; in the 3rd, 7th, and 11th months, on Ren days; in the 4th, 8th, and 12th months, on Geng days.
Rules for Ren Shen locations: On the 11th day, it is located at the nasal bridge; on the 15th day, it is located on the lateral side of the body.
Care and nursing during smallpox inoculation are of utmost importance and must not be neglected from start to finish, such as avoiding wind and cold, and being cautious with diet. When the weather is severely cold, clothing and coverings should be warm to prevent exposure to cold, lest the pathogenic cold interfere with the eruption of pustules. However, one should not use excessively thick cotton or mattresses, which may cause heat stagnation and obstruct the ventilation and eruption of the rash. When the weather is warm, coverings should be moderate to prevent external warmth from combining with internal toxins, leading to increased irritability and heat. Yet, one should not dress too thinly or expose the body, allowing cold pathogens to invade externally and hinder the generation and development of vital energy. Thus, balancing cold and warmth is crucial. Human Qi and Blood rely on food and drink for transformation and nourishment. The entire course of smallpox depends entirely on this. If dietary intake is insufficient, where will Qi and Blood find support? However, excess is also harmful. Overdrinking leads to fluid retention that fails to transform into Jin Ye (Body Fluids); overeating causes food stagnation, generating Phlegm-Heat. Therefore, for infants breastfeeding, milk should not be given in excessive nor insufficient amounts. For children who can eat solid food, they should avoid pungent, hot, roasted, and fried foods; sticky, hard, raw, and cold foods; excessive tea consumption; and cold beverages. Food intake should not lead to fullness nor hunger. Thus, balancing diet is essential. Beyond temperature control and diet, regarding behavior and movement, children should not be indulged arbitrarily, nor should their wills be overly frustrated. It is up to the caregiver to tolerate the child's temperament, act with diligence and caution, and provide proper protection. Precautions are necessary not only after inoculation but also before; not only when the rash first appears but especially after scabs fall off. The inoculator should earnestly instruct and warn in detail, ensuring that parents understand the gravity of the situation, remain cautious, and follow proper care methods to ensure complete safety. If negligence occurs, causing the child to be invaded by wind-cold/heat or injured by improper diet, who will bear the responsibility? This is why those who do not understand the importance of nursing care should absolutely not undergo inoculation.