Ανατροπή: Η διπλή μάσκα βοηθά ελάχιστα στον περιορισμό της εξάπλωσης του κορονοϊού

A man wears a double mask as he visits Times Square in New York on December 10, 2020. - US President-elect Joe Biden said he will ask Americans to wear masks for the first 100 days of his administration to curtail the spread of coronavirus. (Photo by Kena Betancur / AFP) (Photo by KENA BETANCUR/AFP via Getty Images) AFP via Getty Images