Geographic Spread of Influenza as Assessed by State and Territorial Epidemiologists:
During week 16 the following influenza activity was reported:
During week 16 the following influenza activity was reported:
- Regional influenza activity was reported by four states (Arizona, Hawaii, Maine, and South Carolina).
- Local influenza activity was reported by 12 states (Alaska, Connecticut, Delaware, Idaho, Massachusetts, Montana, Nevada, North Dakota, Pennsylvania, Texas, Utah, and Washington).
- Sporadic activity was reported by the District of Columbia and 31 states (Alabama, Arkansas, Colorado, Florida, Georgia, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Missouri, Nebraska, New Hampshire, New Mexico, New York, North Carolina, Ohio, Oklahoma, Oregon, Rhode Island, South Dakota, Tennessee, Vermont, Virginia, West Virginia, Wisconsin, and Wyoming).
- No influenza activity was reported by one state (Mississippi).
- Reports were not provided by two states (California and New Jersey).
- Week 15 (ending April 18, 2009)
- Week 14 (ending April 11, 2009)
- Week 13 (ending April 4, 2009)
- Week 12 (ending March 28, 2009)
- Week 11 (ending March 21, 2009)
- Week 10 (ending March 14, 2009)
- Week 9 (ending March 7, 2009)
- Week 8 (ending February 28, 2009)
- Week 7 (ending February 21, 2009)
- Week 6 (ending February 14, 2009)
- Week 5 (ending February 7, 2009)
- Week 4 (ending January 31, 2009)
- Week 3 (ending January 24, 2009)
- Week 2 (ending January 17, 2009)
- Week 1 (ending January 10, 2009)
- Week 53 (ending January 3, 2009)
- Week 52 (ending December 27, 2008)
- Week 51 (ending December 20, 2008)
- Week 50 (ending December 13, 2008)
- Week 49 (ending December 6, 2008)
- Week 48 (ending November 29, 2008)
- Week 47 (ending November 22, 2008)
- Week 46 (ending November 15, 2008)
- Week 45 (ending November 8, 2008)
- Week 44 (ending November 1, 2008)