COVID-19 & Acute Respiratory Illness (ARI) Cluster Reporting

Instructions for Multiple Sectors


In Los Angeles County, all settings must report clusters of COVID-19 and Acute Respiratory Illness (ARI) to the LA County Department of Public Health (LAC DPH) within 24 hours, as mandated by the LA County Health Officer Order.

In healthcare settings, where the risk of adverse outcomes is higher, timely reporting of COVID-19 case clusters is essential. Specific reporting thresholds are established to ensure swift actions are taken to mitigate the virus's spread.

For non-healthcare community settings, where testing access may be limited, COVID-19 reporting is now incorporated into the existing Acute Respiratory Illness (ARI) symptom-based reporting protocol. This approach aims to facilitate early outbreak detection and management through proactive symptom monitoring.

See below for reporting requirements and information by type of setting.

Report any clusters of more severe illness (such as multiple cases of pneumonia in a group) even if they do not meet the reporting thresholds listed below.

If you are a representative from a laboratory or provider's office seeking information about mandated COVID-19 reporting, visit the Health Professional Mandatory Reporting webpage.

If you are looking to submit an anonymous report, call (888) 700-9995 or submit a complaint.

Healthcare Setting: Reporting Requirements
Community Settings: Reporting Requirements

Public Health has made reasonable efforts to provide accurate translation. However, no computerized translation is perfect and is not intended to replace traditional translation methods. If questions arise concerning the accuracy of the information, please refer to the English edition of the website, which is the official version.

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