The Library recently subscribed to the Incidence and Prevalence Database (IPD), which covers over 4,500 diseases, procedures, symptoms and other health issues for incidence, prevalence, morbidity, mortality, comorbidity, treated or diagnosed rates, costs, market size for drug development, and more. Data is fully sourced and is broken down by U.S. and international data. Statistical summaries include all prevalence and incidence data found in the IPD for a particular disease or procedure.