receives the first COVID-19 vaccine at the center on Dec. 18. Courtesy San Mateo County. In San Mateo County, about one-third of the health care workers and long-term care residents eligible for ...

Photo by Magali Gauthier. California public health officials approved San Mateo County’s move from the most restrictive purple tier COVID-19 designation to the less-restrictive red tier on Feb. 23.

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Colleen Chawla is settling into an important role for San Mateo County: as its chief health officer who manages 2,200 ...