Center for Disease Control and Prevention (CDC) Links
Frequently Asked Influenza (Flu) Questions: 2020-2021 Season
Similarities and Differences between Flu and COVID-19
People at High Risk For Flu Complications
FLUVIEW: Weekly U.S. Influenza Surveillance Report (past weekly reports for the current season and flu seasons back to 1999-2000 are also available)
FluView Interactive – National, Regional, and State Level Outpatient Illness and Viral Surveillance
FluView Interactive – Age Group Distribution of Influenza Positive Tests Reported by Public Health Laboratories
Information about past flu seasons
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.
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.