Fit is key. If a mask doesn’t fit well, it can allow droplets to leak in or out. Look for masks that have nose wires to allow for a tight fit over your nose. A snug fit on the face is also desired.

If you only have a single-layer or loose-fitting mask, it may be smart to wear two at once. To double up, wear one cloth mask over another, or wear a cloth mask over a surgical mask. Experts have long ...

To protect yourself from the Omicron COVID-19 variant, which is more than twice as contagious than the Delta variant, researchers, public-health experts, and infectious-disease doctors now suggest ...

In a big shift from its earlier position, the World Health Organisation (WHO) has issued new guidelines that say everyone should wear a three-layer fabric or non-medical mask in public to prevent the ...