A northern California county has recommended people wear face masks amid a summer surge of COVID-19 cases.

Yolo County's health officer, Dr. Aimee Sisson, said in a press release last Friday that anyone over the age of 2 should wear a mask while indoors when wastewater levels of SARS-CoV-2 (the virus that causes COVID-19) are "high."

When these levels are "medium," people at high risk of severe COVID-19 (older adults, people with underlying medical conditions or people with weakened immune systems) should wear masks.

Newsweek has contacted the Yolo County Health and Human Services Agency and the California Department of Health Care Services via email for comment.

Why It Matters

California's wastewater surveillance, a key indicator of community spread, is registering "high" virus conc

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