Epidemiology & Assessment

The Epidemiology and Assessment unit’s medical directors, public health nurses, and epidemiologists investigate individual cases and outbreaks of reported communicable disease (see List of Reportable Diseases) per the State of California Code of Regulations. We monitor disease trends, and often provide current statistics and other information to doctors, hospitals, the public and news media. For more information or CD reporting 24/7 call 714-834-8180.

For questions or comments, please email epi@ochca.com.

Latest News & Health Advisories

Provider Advisory: Consider MERS in Returning Travelers from the Arabian PeninsulaSeptember 7, 2018
With the annual Hajj pilgrimage to Mecca, Saudi Arabia, ending on August 24, the Orange County Health Care Agency reminds providers that Middle East Respiratory Syndrome Coronavirus (MERS-CoV or MERS) illness should be considered in returning travelers who present with symptoms consistent with lower respiratory tract infection.

CD Connection Newsletter - AugustAugust 31, 2018
Salmonellosis in Orange County Overview

Provider Advisory: Increase in Mumps Cases Among Young Adults in Orange CountyAugust 23, 2018
Orange County Health Care Agency has received five reports of mumps cases among young adults since June 1, 2018. The cases ranged in age from 18-22, three of five were male.

Provider Advisory: Orange County's First West Nile Virus Human Infection of the Season ReportedAugust 8, 2018
A Tustin woman in her 70s was diagnosed this week with West Nile Virus (WNV) neuroinvasive disease. This is the first human WNV infection identified in Orange County this season. Human infections have already been reported this season in the surrounding counties of Los Angeles, Riverside, and San Bernardino.

CD Connection Newsletter - JulyJuly 31, 2018
Antibiotic-Resistant Shigellosis in Orange County Overview