By Maggie Fox, Health and Science Editor
WASHINGTON (Reuters) - A common strain of influenza circulating in the United States this winter is resistant to Tamiflu, the most popular drug used to treat it, federal health officials said on Friday.
The situation poses little danger, according to the U.S. Centers for Disease Control and Prevention, because Tamiflu is only used in a minority of cases.
Forty nine out of 50 samples tested resist the drug, although they can still be treated with other flu medications, the CDC said in a special advisory to doctors.
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