California regulations require cases of selected communicable diseases to be reported (PDF) to the California Department of Public Health (CDPH). CDPH and local health departments (LHD) monitor cases and disease outbreaks to identify, control, and prevent infections in an ongoing effort to help protect the health of Californians.
The Epidemiologic Summaries of Selected Communicable Diseases in California describe the incidence and distribution of selected infectious diseases in California, with descriptions by county or region, sex, age group, race/ethnicity, and month of estimated illness onset, as applicable.
The Epidemiologic Summaries are organized into separate chapters containing a summary of each selected infectious disease. Each disease chapter contains a plain language overview (Key Findings), followed by detailed background information, California reporting requirements and case definitions, epidemiology of the specific disease, corresponding figures, commentary, and references. The Technical Notes describe the definitions, methods, and limitations associated with the Epidemiologic Summaries.