Since first reported in March, American officials have confirmed highly pathogenic avian influenza (HPAI) in dairy cattle in 12 states, raising questions about whether consuming dairy from infected cows poses a risk to humans. According to the CFIA, HPAI hasn’t been found in Canadian livestock. The virus’s rapid spread across the United States — in roughly 200 cows and three dairy farm workers — led Erica Spackman, a virologist in the U.S. Department of Agriculture (USDA) in Athens, Ga., to ask: “How far is the virus getting through?”