Historical medical term for inoculation against smallpox using material from human smallpox lesions. Abbreviation of 人痘接種法.
See also: 人痘接種法
Variolation was introduced from China during the Edo period.
Vaccination using cowpox material, a later and safer method that replaced variolation.
Compound of 人 (human), 痘 (smallpox), and 法 (method). The exact historical derivation is uncertain, but the term reflects the practice of using human smallpox material for inoculation.