Tamiflu is a prescription antiviral medicine commonly used for seasonal influenza that is being offered as a preventative measure for avian influenza, said Dr. Steven Krager, the interim health officer for Benton and Franklin counties. It also is being offered to workers who have symptoms or have tested positive to help them fight the infection.

The Centers for Disease Control & Prevention confirmed two human cases of avian influenza in Washington on Thursday following an outbreak on a commercial poultry farm.

Two cases of avian influenza in humans were confirmed by the CDC after exposure at a Washington poultry farm. Investigations and precautionary measures are underway, with no severe illness reported.