Re A @CDCMMWR report looking at schools in two AZ counties found that schools w/o a mask requirement were 3.5 times more likely to have a #COVID19 out…


Re A @CDCMMWR report looking at schools in two AZ counties found that schools w/o a mask requirement were 3.5 times more likely to have a #COVID19 outbreak than schools that required masks from the start of the school year. More: http://bit.ly/MMWR92421

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