After weeks of indecision, California health officials Wednesday added San Mateo to a watchlist of counties experiencing troubling coronavirus transmission. The county has teetered on the edge of a listing since mid-July, when monitoring of its coronavirus data registered a spike in cases. The state is asking the county to expand testing and contact tracing, find more places for those infected with the coronavirus to quarantine away from their families, and prepare its hospital systems for a potential surge in COVID-19 patients. #sanmateo #sanmateocounty