Scientists tracking bird flu in cows and milk want answers to these 4 questions : Shots - Health News NPRThe 'milk supply is safe': Biden administration scrambles to reassure Americans as bird flu spreads POLITICOUpdates on Highly Pathogenic Avian Influenza (HPAI) FDA.govBird flu virus traces found in 1 in 5 samples of pasteurized milk: FDA The HillWhat is H5N1? Bird flu infecting U.S. dairy cattle, explained Quartz