How the omicron variant is changing public health rules in these Northern California counties

County public health officials across Northern California are keeping a close eye on news about the omicron variant, after the Centers for Disease Control and Prevention, classified it a "variant of concern" earlier this week. "We need to prepare, which means people need to get vaccinated and get a booster where possible," said John Faust, spokesperson for Yolo County Public Health. Yolo County has not found a positive case of omicron from its testing at UC Davis yet, but tells KCRA 3 rules and guidelines could change as new information comes in over the next few weeks.