Elizabeth Carlton, an epidemiologist at the Colorado School of Public Health, agreed that the risk to the general public right now is low. Systems designed to detect upticks in flu infections through hospital data and wastewater testing have not sounded any alarms. Pasteurized milk — what is sold in grocery stores — is safe to drink, though raw milk may not be. “Where we need to ramp up the level of concern in the population is when we see those dairy farm workers get infected and spread it to their families,” she said.