WASHINGTON, Dec 19 (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.
WASHINGTON, Dec 19 (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.
