World The CDC Says Tight-Fit Masks or Double Masking Increases Protection February 10, 2021February 10, 2021Roni Caryn Rabin and Sheryl Gay StolbergComments Off on The CDC Says Tight-Fit Masks or Double Masking Increases Protection Transmission of the virus can be dramatically reduced by well-fitted masks or double-masking, according to new research by the C.D.C.
