New mask advice from the Centers for Disease Control and Prevention connected with a new study focuses on making sure masks fit correctly to better prevent the spread of COVID-19. The CDC studied whether wearing two masks provided more protection than one and found that it did. The researchers found that wearing one mask surgical or cloth blocked about 40% of the particles coming .
New mask advice from the Centers for Disease Control and Prevention connected with a new study focuses on making sure masks fit correctly to better prevent the spread of COVID-19.