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Public Health

The CDC director said its guidance for people fully vaccinated against COVID-19, which says  masks are not required in most indoor settings, has not changed amid renewed attention to mask-wearing fueled by the delta variant. 

Researchers from Harvard University and the Massachusetts Institute of Technology, both based in Cambridge, Mass., have created small diagnostic biosensors that can be inserted into face masks and can diagnose COVID-19 within 90 minutes, The Mercury News reported June 29. 

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