Acute Communicable
Disease Control

Contact Information
County of Los Angeles
Department of Public Health
Acute Communicable Disease Control
313 N. Figueroa Street, #212
Los Angeles, CA 90012
Phone: (213) 240-7941
Fax: (213) 482-4856

Call 211 For Information 24/7

Have questions about things like where to go for vaccinations or other health care services?

Call 2-1-1.

Adobe Reader

Note: PDF documents on this site were created using Adobe Acrobat 5.0 or later. If you are using an earlier version of Adobe Acrobat Reader (4.x or less), document functionality may be reduced.
Influenza in Los Angeles County
Flu season in Los Angeles County is typically considered the first week of October through the end of March. However, flu circulates throughout the year. Flu activity can vary substantially from season to season, and levels locally can differ from activity seen in the rest of the state and the nation.

Influenza Watch and Season Summaries from Past Seasons
Influenza Watch Archive

Los Angeles County influenza surveillance information is summarized during flu season and released to the public through our free emailed Influenza Watch report. To receive this report, email "Subscribe Flu Watch" to

INFLUENZA WATCH: Latest issue -- Week 11, 2023

Los Angeles County Influenza Surveillance Special Reports
2012 2011 2010 2009 2008 2007 2006 2005 2004 2003
Adobe PDF Document

Surrounding Counties

Additional Resources

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.
Los Angeles County Seal: Enriching lives through effective and caring services