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May 20 CDC weekly flu update

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May 20 WHO flu update

So r the surveillance findings dont suggest that flu season has started yet in the Southern Hemispheres temperate countries, where the season typically runs from May through October. Australia had previously reported higher-than-expected numbers of flu detections in two northern states, but detections have decreased in most areas in recent weeks, the WHO noted. Over the Southern Hemispheres summer the country reported low-level but persistent H3N2 circulation, but over the past week 2009 H1N1 and influenza B strains have been more frequently detected.

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Influenza B was the dominant strain, followed by H3N2, unsubtyped influenza A, and 2009 H1N1, according to the CDC.

Center for Infectious Disease Research & Policy

Academic Health Center — University of Minnesota

Visits to the doctor for flu-like illness decreased again for the 12th week in a row, keeping at a summertime level.

Three pediatric flu deaths were reported, raising the seasons total to 105. One was from the 2009 H1N1 virus, one was from H3N2, and one was from an unsubtyped influenza A virus.

In Venezuela, an earlier surge in 2009 H1N1 activity that peaked in late March has now subsided to very low levels. Several countries in Central and South America are reporting increases in respiratory infections due to respiratory syncytial virus (RSV).

No states reported widespread, regional, or local flu aeastern healCIDRAPctivity. Puerto Rico and 27 states reported only sporadic activity, the CDC said.

Only small numbers of viruses have recently been detected in Europe, North Africa, and the Middle East. Of the few detected, influenza B has been most common. Likewise, in eastern Asian countries such as China and Japan flu levels are very low, with influenza B as the most commonly detected strain, the WHO reported.

Copyright © 2011 Regents of the University of Minnesota

Routine surveillance for oseltamivir (Tamiflu)-resistant 2009 H1N1 viruses found one more isolate, pushing the seasons total to 40.

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All levels were below baseline, even the percentage of deaths from pneumonia and flu, which has lagged the decline of other flu signals, the US Centers for Disease Control and Prevention (CDC) said today.

In global flu developments, a few tropical countries are reporting low-grade transmission, including the Dominican Republic, Venezuela, Jamaica, Rwanda, and Madagascar, the World Health Organization (WHO) said today. The predominant viruses in those locations vary and range from 2009 H1N1 in the Dominican Republic to influenza B in Madagascar.

Lisa SchnirringStaff Writer

May 20, 2011 (CIDRAP News) &150; Flu indicators fell again in the United Steastern health h1n1ates last week as the 2010-11 flu season approaches its end, with very little activity occurring elsewhere in the world, US and global surveillance organizations said today.

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