The finalized data presented here may differ from the preliminary data published in the weekly reports due to the addition of late reports. If you are looking for data from a more recent season please refer to the final weekly report for that season (www.cdc.gov/ncidod/diseases/flu/weeklychoice.htm). Once data from each season have been finalized they will be added to this page.

1. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (NREVSS) Collaborating Laboratories

• Weekly Surveillance Lab Data: 2001 - 2002
• Weekly Surveillance Lab Data: 2000 - 2001
• Weekly Surveillance Lab Data: 1999 - 2000
• Weekly Surveillance Lab Data: 1998 - 1999
• Weekly Surveillance Lab Data: 1997 - 1998
  

2. U.S. Influenza Sentinel Physicians Surveillance Network

• Weekly Surveillance Data: 2001 - 2002
• Weekly Surveillance Data: 2000 - 2001
• Weekly Surveillance Data: 1999 - 2000
• Weekly Surveillance Data: 1998 - 1999
• Weekly Surveillance Data: 1997 - 1998