How was the HPAI-infected pig discovered? RFD-TVExperts Reveal What The Pig With Bird Flu in Oregon Really Signifies ScienceAlertCalifornia, Washington report more suspected H5 avian flu cases University of Minnesota Twin CitiesBird Flu Is One Step Closer to Mixing with Seasonal Flu Virus and Becoming a Pandemic Scientific AmericanUS detects H5N1 bird flu in a pig for the first time Reuters