Study: Bird flu mutations reduce antiviral drug effectiveness

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Image shows colorized transmission electron micrograph of bird flu viruses (seen in gold) grown in cells (by Cynthia Goldsmith).

Four mutations in bird flu viruses allow them to escape human antiviral drugs without compromising their fitness, studies at The Pirbright Institute have revealed.

If flu strains with these mutations jump from birds to humans, available options for prevention and treatment could be limited.

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