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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

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 are archived by week ending date.

 2017-2018 Season
 2015-2016 Season
 2013-2014 Season

The final report of the 2013-14 influenza season was for the week ending March 15, 2014.

 2011-2012 Season
 2009-2010 Season
 2016-2017 Season
 2014-2015 Season
 2012-2013 Season
 2010-2011 Season
 2008-2009 Season
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