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 ...

With the delta variant surging and health officials urging indoor mask use — and requiring masks indoors for many Bay Area locations — you've likely pulled out ...

Wearing a cloth mask over a surgical one can greatly reduce coronavirus transmission. Knotting and tucking a surgical mask so that it fits better is very effective, too. Other mask types can be paired ...