Influenza report

Last updated: 5/31/23

The County of Santa Clara Public Health Department provides regular summaries of current data during each influenza season. Influenza season typically occurs between October through the following May, but can fluctuate. Influenza can also be referred to as “flu.”

The County of Santa Clara Public Health Department uses a range of methods to monitor trends in influenza activity during influenza season. We monitor reported emergency department influenza-like illness (ILI) data, influenza laboratory data provided by clinical laboratories, and severe and fatal influenza cases.

Reporting for the 2022-2023 influenza season in Santa Clara County ended after week 21 (May 21 to May 27, 2023). Summary reports for this and previous seasons are posted below.

Influenza reports

Refer to the California Department of Public Health Influenza website for California influenza data and the Centers for Disease Control and Prevention Influenza Surveillance website for United States influenza data. 


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