California Department of Public Health (CDPH) Influenza Surveillance Program
Historic Influenza and Other Respiratory Disease Surveillance Reports
The California Department of Public Health (CDPH) Influenza Surveillance Program (CISP) is a collaborative effort between CDPH, the Centers for Disease Control and Prevention (CDC), Kaiser Permanente, California local health jurisdictions and the participating California sentinel providers and sentinel laboratories. Influenza surveillance in California is particularly important due to its coastal location with several ports of entry for flights and shipping from Asia. Annual influenza epidemics follow a winter seasonal pattern in the United States with typical activity peaking during late December to early February. CDPH obtains and analyzes clinical, and laboratory data year-round in an effort to determine the timing and impact of influenza activity and to determine how well circulating strains of the virus match those used in the current influenza vaccines.
(All links are PDF files)
Annual Reports
2019-2020
PDF | Excel
2018-2019 | 2017-2018 | 2016-2017 | 2015-2016
2014-2015 | 2013-2014 |
2012-2013 | 2011-2012
2010-2011 | 2007-2008 | 2006-2007 | 2005-2006
2004-2005 | 2003-2004 | 2002-2003 | 2001-2002
2000-2001 | 1999-2000
Surveillance Reports
Reports (PDF) and data tables (Excel) are archived by week ending date.