Maryland Cremation Services transporter Morgan Dean-McMillan adjusts her N95 face mask in Silver Spring, Md., on May 11, 2020. (Chip Somodevilla/Getty Images) You’re reading The Checkup With Dr. Wen, ...

New research shows that while many cloth and medical masks fall short against tiny airborne particles, simple hacks like overmasking or using braces can dramatically improve your protection, yet only ...