From Our 2009 Archives
Swine Flu Virus Dominant Strain Worldwide: WHO
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THURSDAY, Nov. 5 (HealthDay News) -- The H1N1 swine flu virus is now the predominant flu strain worldwide, although it shows no signs of becoming more virulent and continues to produce mild-to-moderate symptoms in most people, the World Health Organization's flu chief said Thursday.
In some countries, the swine flu accounts for up to 70% of the flu viruses being sampled, Dr. Keiji Fukuda said during a press briefing, the Associated Press reported.
In the United States, virtually all flu activity right now is from the H1N1 virus, according to federal health officials.
But unlike seasonal flu, which typically strikes hardest at people over age 65, the H1N1 swine flu targets a disproportionate number of people under 65, Fukuda said.
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