Bird flu cases in people tick up: Dozens reported across 6 states NBC NewsPresumed human infections with avian influenza under investigation in Washington OregonLiveBird Flu Update as Virus Suspected in Four Washington Farmers NewsweekWashington reports 4 suspected H5 avian flu infections in poultry workers University of Minnesota Twin CitiesBird flu in humans: do you have to be worried? KEPR 19