a set of mathematical formulas, axioms, and laws first enunciated in the annual reports submitted by William Farr to the Registrar General of England and Wales from 1839–1883. The laws deal with the relationship of incidence to prevalence, the natural history of epidemics, and mathematical features of common types of epidemic.
[Derived from the writings of William Farr, British medical statistician]
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Examples: glitazone, GI cocktail, etc.