Disease Surveillance

Pursuant to Title 17, California Code of Regulations Sections 2500, 2593, 2641 – 2643, and 2800 – 2812, the Public Health Services Epidemiology and Immunization Services Branch receives reports for reportable diseases and conditions in San Diego County.

The County of San Diego's Public Health Services, Epidemiology Program (Epi) conducts ongoing public health surveillance for over 80 diseases and conditions. Local surveillance activities include communicable disease surveillance, monitoring emerging infections and the detection and investigation of disease outbreaks. Prevention and control efforts also include communication with health care providers about local disease patterns and serving as a consultant to the medical community on issues of disease prevention and health information.

Influenza Surveillance

The San Diego County Epidemiology, Immunization, and the Public Health Laboratory, conducts year-round influenza surveillance with the assistance of medical providers and partners throughout San Diego County. Local influenza surveillance efforts include the cooperation of participating schools, hospitals, laboratories, and clinics. 

The Influenza Watch is the San Diego County Influenza Surveillance Summary and is updated weekly during influenza season. Subscribe/unsubscribe to the Influenza Watch weekly emails (or update your email address).

For more information regarding influenza case reporting and surveillance, go to the County's Influenza information web page.

Season Summaries - Click on links below to view influenza season summaries

West Nile Virus Surveillance

Epi works in collaboration with the San Diego Public Health Laboratory (PHL) to detect, monitor, and respond to suspect human cases of West Nile virus (WNV). Epi provides local healthcare providers with clinical and testing guidelines for WNV, submission forms for WNV testing, and facilitates referrals to the California Department of Public Health's Viral and Rickettsial Disease Laboratory (VDRL) for further testing and confirmation.

West Nile Virus Links:


West Nile Virus in San Diego County


For more information phone 619-692-8499 or send us an email.