Changing the mask every 20-30 minutes, as advised by the department of Rospotrebnadzor in Chuvashia, is redundant, infectious disease specialist,
DOCTOR of medical sciences Nikolai Malyshev told RBC. “I think it’s redundant to change the mask every half an hour. The fact that Rospotrebnadzor recommends this is, of course, correct, but if a pensioner spends a lot of time on the street, then how muc...