From left, Duke the dog, Sam, 10, Megan, Charlie, 4, and Chris Lierman in their backyard on July 28, 2021, in Arlington Heights. The Liermans, who live in School District 25, support mask wearing and the following of CDC guidelines in COVID-19 prevention. (Stacey Wescott / Chicago Tribune)
Masks up for debate again at suburban districts after CDC calls for universal masking in schools. ‘All of the mama bears are on high alert right now.’

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