Martinez COVID-19 Indoor Exposure Risk; Latest Case Count

SAN RAMON, CA — As the holiday season kicks off and officials warn residents about limiting their interactions with others outside of their own household to curb the spread of the coronavirus, a tool developed by researchers from several universities lets you see your risk of exposure to the virus at an indoor gathering.

The tool shows the estimated chance — between 0 and 100 percent — that you’ll encounter at least one person with the coronavirus at an event in your county. You can reduce the risk by wearing a mask, distancing and gathering outdoors in smaller groups, researchers said.

As of Wednesday, if you were to attend an event with at least 15 people in Contra Costa County, there’s a 13 percent chance that someone in the group could expose you to the virus, according to the COVID-19 Risk Assessment Planning Tool. If your gathering has 10 people,

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