3.Estimated Incidence and Prevalence of Tuberculosis

1. WHO recommends in its annual report using one (or more than one) of the following formulas for calculation of incidence: 1. Incidence=cases notifications/proportion of cases detected 2. Incidence=prevalence/duration of condition 3. Incidence=annual risk of infection × Sty'blo coefficient 4. Incidence=deaths/proportion of incident cases that die