As COVID positivity rates remain on a steady rise, health facilities are starting to reintroduce safety protocols such as masks.
Kaiser Permanente Northern California has resumed a mask requirement for doctors and staff at its facilities in the Santa Rosa area.
It is also encouraging patients and visitors to wear masks.
In a statement Wednesday, Kaiser said in part: "In all of our Northern California facilities, even in areas where not required, masks remain a recommended tool to prevent the spread of respiratory-like illnesses. We continue to encourage individuals to get the COVID-19 vaccine to protect against severe illness."
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It was not immediately clear if other Kaiser facilities in the Bay Area were following suit with a mask protocol for workers.