醫宗金鑑·幼科種痘心法要旨

Yīzōng jīnjiàn · Yòukē zhǒngdòu xīnfǎ yàozhǐ 醫宗金鑑·幼科種痘心法要旨

Golden Mirror of Medical Tradition: Essential Principles of the Heart-Method for Pediatric Variolation by 吳謙 Wú Qiān (奉敕撰)

About the work

The dedicated variolation (人痘接種, réndòu jiēzhòng) section of the imperially-commissioned Yīzōng jīnjiàn 醫宗金鑑 (1742) compiled under Wú Qiān 吳謙’s editorship by order of the Qiánlóng emperor. This is the single most historically important pre-Jennerian Chinese state-sanctioned exposition of variolation — the inoculation of children against smallpox by deliberate transfer of attenuated material from a mild smallpox case. The text systematises variolation practice that, by Qīng court attribution, had originated in the Northern Sòng Zhēnzōng era (10th–11th c.) with the legendary smallpox-curing shénrén 神人 of Mount Éméi 峨眉山, who reputedly variolated the son of Chancellor Wáng Dàn 王旦. Although the text concedes this origin story is miǎománg 渺茫 (vague), it argues that the practical efficacy of variolation justifies its endorsement and detailed transmission — variolation as qùxiǎn lǚpíng, bìwēi jiùān 去險履平、避危就安 (removing peril for level ground, fleeing danger for safety).

Tiyao

The Yīzōng jīnjiàn was an imperially commissioned compilation, not a Sìkù recensioned text in the usual sense; no separate 提要 survives in the source frontmatter. The work’s introductory programmatic statement (the Zhòngdòu yàozhǐ 種痘要旨) serves a comparable role.

Abstract

The text classifies the four available variolation techniques and ranks them by safety:

1. Shuǐmiáo 水苗 (wet-seed method) — pulverised smallpox scab moistened with water and packed into cotton wadding, inserted into the nostril (male left, female right). The work’s recommended method. Six shíchén 時辰 (twelve clock-hours) is the prescribed duration before removal; the miáoqì 苗氣 (seed-qì) gradually transfers to the Lung via the nasal orifice. The work’s explicit endorsement: píng wěn shàn dāng, jǐn shàn jǐn měi, kě fǎ kě chuán 平穩善當，盡善盡美，可法可傳 (steady, sound, and reliable — model and transmissible).
2. Hànmiáo 旱苗 (dry-seed method) — pulverised scab insufflated dry into the nostril via a curved silver tube. Faster but more violent than wet-seed; safe enough for robust children. Increasingly favoured by the work’s late-Míng / early-Qīng contemporaries because of its operational simplicity, but the Yīzōng jīnjiàn prefers wet-seed for didactic transmission.
3. Dòuyī 痘衣 (smallpox-garment method) — clothing the uninfected child in the worn shirts of a child with a shùn (favorable) smallpox case for several days. Variolation by garment-transmission is judged unreliable: qì bó bù tòu, duō bù yìng 氣薄不透，多有不熱不出 (the transmitted qì is too thin to penetrate; many cases yield no fever and no eruption). Not recommended.
4. Dòujiāng 痘漿 (smallpox-pus method) — direct transfer of pus from an active case via cotton wad to the nostril of the uninfected child. The work condemns this as a rěnxīn hàilǐ bùrén zhī shì 忍心害理不仁之事 (cruel, unethical, inhumane act): the donor child’s zhēnqì 真氣 is dissipated, and the dú bù néng jiě 毒不能解 — the donor’s smallpox often becomes more severe. Explicitly forbidden.

The treatise then details: selection of suitable scab-material (only from a shùn — favorable, smooth-course — smallpox case, with thick, lustrous, full-bodied cānglà guāngzé 蒼蠟光澤 scabs — most ordinary scabs do not qualify); storage of seeds (in clean porcelain jars, kept cool, with spring-month material viable for 30 days and winter-month material for 40–50 days); auspicious timing for variolation (spring is optimum; summer is forbidden because of summer-yáng externalisation of the body’s qì; autumn is permitted only if good seeds are available; winter, especially after the winter solstice, is also excellent); calendar selection (specifically chéngrì 成日 and kāirì 開日 of the sexagenary day-cycle, plus Tiāndé / Yuèdé 天德/月德 directional propitiousness days); proscribed days (the eleventh of each month, when rénshén 人神 stays at the nostril bridge; the fifteenth, when it pervades the body); detailed tiáoshè 調攝 regimen (warm clothing without overheating, restrained feeding, no exposure to alarming sights or sounds); strict ritual seclusion of the variolation chamber (no menstrual women, no funeral-attire visitors, no Buddhist / Daoist monks); the Bìhuì xiāng 闢穢香 antiseptic incense formula (Cāngzhú + Dàhuáng burning continuously); criteria for kě zhòng 可種 (variolation-eligible) vs bùkě zhòng 不可種 children (with very long lists of facial-feature, body-habitus, and constitutional contra-indications); the seven-day timeline of miáoqì transmission through the five zàng; recognition and management of xìnmiáo 信苗 (“signal pustules” — small pre-fever appearance of pre-eruption miniature pustules indicating that the miáoqì is taking); bǔzhòng 補種 (re-variolation if the first attempt produces no fever within 11 days); and recognition of zìchū 自出 (spontaneous smallpox cases that supervene during the variolation timeline by coincidence with natural epidemic — distinguishable because they appear before the 7-day timeline).

The 1742 imperial endorsement of variolation through this section of the Yīzōng jīnjiàn fixed the variolation programme as the official state-medical paediatric procedure of the high Qīng. It is the single most influential pre-Jennerian smallpox prevention text in any language, transmitted from China both to Russia (via Lhasa and via the Russian medical embassy of 1689) and, possibly, ultimately influencing Edward Jenner’s late-18th-century vaccination programme.

Translations and research

• Joseph Needham, Science and Civilisation in China, Vol. 6.6: Medicine (Cambridge, 2000), pp. 113–174 — the definitive Western-language treatment of Chinese variolation, with substantial discussion of the Yīzōng jīnjiàn programme.
• Chia-feng Chang, “Aspects of Smallpox and Its Significance in Chinese History,” PhD diss., University of London, 1996.
• Angela Ki Che Leung, “‘Variolation’ and Vaccination in Late Imperial China, ca. 1570–1911,” in S. Plotkin and B. Fantini (eds), Vaccinia, Vaccination, and Vaccinology (Elsevier, 1996).
• Marta Hanson, Speaking of Epidemics in Chinese Medicine. Routledge, 2011 — for Qīng disease-prevention context.

Other points of interest

The 1742 Yīzōng jīnjiàn variolation section’s explicit ranking of techniques — wet-seed > dry-seed > smallpox-garment > smallpox-pus, with the last condemned on ethical (not merely technical) grounds as inhumane — is one of the earliest formal medical-ethical evaluations of an experimental medical procedure in any tradition. The procedure’s success rate, as recorded by the Yīzōng jīnjiàn, was so high that variolation became standard upper-class Qīng paediatric practice, with substantial reductions in childhood smallpox mortality demonstrable through Manchu-Banner population records.

Links

• 醫宗金鑑·幼科種痘心法要旨 jicheng.tw
• Kanseki DB
• Yīzōng Jīnjiàn (Wikidata) — parent compilation.