Tamiflu May Be Less Effective Against Flu in Europe
Roche Holding AG's Tamiflu may be losing potency against seasonal influenza in Europe after tests showed resistance to the drug in more than one of 10 samples. Tests on 148 virus specimens from patients with the H1N1 flu strain in 10 European countries found 19 that harbored resistance to the pill, most of them in Norway, the European Centre for Disease Prevention and Control said today. The results show viruses capable of evading Tamiflu, also known as oseltamivir, may be spreading. Some resistant viruses were also found in the U.S., leading doctors to consider GlaxoSmithKline Plc's Relenza and other treatments for a disease the World Health Organization estimates causes 250,000 to 500,000 deaths globally each year.
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