Swine Flu Anatomy of Epidemic
AP News 2009-05-01 20:57:27
FILE - In this April 29, 2009 file photo, China's Margaret Chan, Director General of the World Health Organization, WHO, speaks during a press briefing to announce new developments on the swine influenza situation, at the World Health Organization (WHO) headquarters in Geneva, Switzerland. WHO raised its flu alert to phase five out of six. (AP Photo/Keystone, Martial Trezzini, File)
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