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Published online 8 March 2005 | Nature | doi:10.1038/news050307-6

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Vietnam faces worrying increase in bird flu

Nurse may have caught the virus from patient.

Reports that a 26-year-old Vietnamese male nurse has tested positive for bird flu have added to concerns that the virus may gain the ability to pass between humans. But health officials have yet to determine exactly how the man contracted the illness.

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