Related Content

Related Overviews

William Farr (1807—1883) statistician and epidemiologist


More Like This

Show all results sharing these subjects:

  • Medicine and health
  • Public Health and Epidemiology


Show Summary Details


Farr's laws

Quick Reference

William Farr demonstrated that epidemics decline at a mathematically predictable rate, using empirical observations of a smallpox epidemic to confirm this. He later formulated several other mathematical equations and laws that apply to epidemics, e.g., that prevalence of a disease can be calculated from the mathematical product of incidence and the average duration.

Reference entries