Avian influenza case confirmed in Clackamas County egg farm Oregon Public BroadcastingBird flu cases in people tick up: Dozens reported across 6 states NBC NewsUS confirms two human bird flu cases in Washington state ReutersBird flu infects 4 in Washington state; CDC deploys team The HillBird flu cases rise to 31 in US, still no evidence of person-to-person spread: CDC ABC News