Scientists in Australia are raising concerns about a new strain of swine influenza that's resistant to Tamiflu, and reports suggest it's also circulating in the U.K. The H1N1pdm09 strain does respond to another antiviral drug, Relenza, and it can be prevented with a vaccine. Cases have cropped up in healthy people who have never taken Tamiflu, suggesting the virus is easily spread between humans. "The greatest concern is that these resistant viruses could spread globally, similar to that seen in 2008 when the former seasonal H1N1 virus developed oseltamivir resistance and spread worldwide," said World Health Organization researcher Aeron Hurt.
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