Nursing homes and assisted-living centers across California continued to see significant increases in coronavirus cases, alarming officials who are trying to slow the spread.

The older populations of these facilities almost always have underlying health problems, making them particularly vulnerable to the coronavirus. They often live in close quarters. Administrators have responded by banning visitors, confining patients to their rooms and scrambling to create sterile wings to treat residents who contract the disease.

Still, there have been outbreaks at facilities from Redondo Beach to Burlingame.

Twenty-seven people at a skilled nursing facility in the East Bay city of Orinda have tested positive for the coronavirus.

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