Influenza Quick Links Collection

11/13 – added Influenza Surveillance Datasets

California Department of Public Health (CDPH) Links

CDPH’s main Influenza (Flu) and Other Respiratory Diseases page.

Current and archived Surveillance Reports

California Department of Health & Human Services Influenza Surveillance Datasets (CSV and Excel files)

County Influenza Links

Note – Not all counties share regular local weekly influenza reports. Some counties also don’t start until influenza activity picks up within their county. 

Los Angeles County


Los Angeles County influenza surveillance information is summarized during flu season and released to the public through their free emailed Influenza Watch report: To receive this report, email “Subscribe” to fluwatch@listserv.ph.lacounty.gov.

Influenza in Los Angeles County Website

Flu Vaccination Page

Influenza Watch Archive Los Angeles County

Marin County


Marin Flu Surveillance Data – email subscription to the county influenza surveillance available on the page.

San Diego County


Weekly Influenza Watch (current edition) – The San Diego County influenza surveillance report is updated weekly during influenza season

Influenza Slide Deck, 2020-21 Year to Date – weekly update (current edition) – Influenza surveillance tables and graphs, for public use.

Past Influenza Season Reports