Signs urging everyone to mask up have largely disappeared from places like grocery stores and schools in the third year of the Covid-19 pandemic. But they remain in many medical offices, and a study ...

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 ...

To letter writer Kari Kronborg: If a mask makes you feel better, by all means, enjoy wearing one for as long as you desire: It’s your personal choice. You questioned, “If masks don’t work, then why do ...

N95 masks have helped health care professionals stay safe while providing care to sick people for many years. This pandemic is no different. As with other infectious agents, it's advisable to use ...

Editor's note: Find the latest COVID-19 news and guidance in Medscape's Coronavirus Resource Center. Regular medical masks might provide protection similar to that of N95 respirators in preventing ...

As more information about the coronavirus pandemic develops, some of the information in this story may have changed since it was last updated. For the most up-to-date information on COVID-19, please ...