Influenza A showing Tamiflu resistance

ATLANTA, Dec. 19 (UPI) -- The U.S. Centers for Disease Control and Prevention said Influenza A (H1N1) is showing resistance to the drug oseltamivir (Tamiflu).

The agency based in Atlanta said patients suspected of having Influenza A should instead be treated with the antiviral drug Relenza or a combination Tamiflu and rimantadine. The CDC issued the health alert advisory Friday after studying preliminary flu data from a limited number of states.

The CDC said this year's flu vaccine is expected to be effective in preventing or reducing the severity of circulating influenza viruses and recommends medical personnel continue vaccination efforts.