SF museum to bring back COVID-era rule despite lack of scientific support

COVID-era masking is making a brief comeback at one San Francisco museum. The Exploratorium announced Tuesday that all visitors and staff will once again be required to wear N95, KN95 or KF94 masks from 9 a.m. to 11 a.m. on Aug. 22 during a special session designed to give immunocompromised guests what the museum called...