During week 8 (February 21-27, 2010), influenza activity remained at approximately the same levels as last week in the U.S. 263 (6.4%) specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (..

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UPDATE: Weekly FluView Map and Surveillance Report for Week Ending February 27, 2010 (source: CDC)

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During week 7 (February 14-20, 2010), influenza activity remained at approximately the same levels as last week in the U.S. 185 (4.4%) specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (…

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UPDATE: Weekly FluView Map and Surveillance Report for Week Ending February 20, 2010 (source: CDC)

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During week 6 (February 7-13, 2010), influenza activity remained at approximately the same levels as last week in the U.S. 129 (3.5%) specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (N..

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UPDATE: Weekly FluView Map and Surveillance Report for Week Ending February 13, 2010 (source: CDC)

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During week 5 (January 31-February 6, 2010), influenza activity remained at approximately the same levels as last week in the U.S. 206 (4.8%) specimens tested by U.S.

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UPDATE: Weekly FluView Map and Surveillance Report for Week Ending February 6, 2010 (source: CDC)

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During week 4 (January 24-30, 2010), influenza activity remained at approximately the same levels as last week in the U.S. 119 (3.2%) specimens tested by U.S. World Health Organization (WHO) and National Respiratory and Enteric Virus Surveillance System (N..

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UPDATE: Weekly FluView Map and Surveillance Report for Week Ending January 30, 2010 (source: CDC)

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During week 2 (January 10-16, 2010), influenza activity decreased slightly in the U.S. 120 (3.7%) specimens tested by U.S.

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UPDATE: Weekly FluView Map and Surveillance Report for Week Ending January 16, 2010 (source: CDC)

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During week 1 (January 3-9, 2010), influenza activity continued to decrease in the U.S. 139 (3.6%) specimens tested by U.S.

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UPDATE: Weekly FluView Map and Surveillance Report for Week Ending January 8, 2010 (source: CDC)

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During week 52 (December 27, 2009-January 2, 2010), influenza activity decreased slightly in the U.S.

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UPDATE: Weekly FluView Map and Surveillance Report for Week Ending January 2, 2010 (source: CDC)

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During week 51 (December 20-26, 2009), influenza activity decreased slightly in the U.S. 154 (3.9%) specimens tested by U.S

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UPDATE: Weekly FluView Map and Surveillance Report for Week Ending December 26, 2009 (source: CDC)

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This report provides an update to the international situation as of December 28, 2009. The World Health Organization (WHO) continues to report updated 2009 H1N1 flu-associated laboratory-confirmed cases and deaths on its Web page

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UPDATE: 2009 H1N1 Flu International Situation Update (source: CDC)

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