allergy: [20] Allergy was borrowed from German allergie, which was coined in 1906 by the scientist C E von Pirquet. He formed it from Greek allos ‘other, different’ and érgon ‘work’ (source of English energy and related to English work). Its original application was to a changed physiological condition caused by an injection of some foreign substance. => energy, work[allergy etymology, allergy origin, 英语词源]
1911, from German Allergie, coined 1906 by Austrian pediatrician Clemens E. von Pirquet (1874-1929) from Greek allos "other, different, strange" (see alias (adv.)) + ergon "activity" (see organ).