Cloth masks do little to prevent the spread of COVID-19, or other airborne diseases, a new study finds. Researchers from the University of Bristol in the United Kingdom found that 90 percent of ...

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 ...

Double masking can significantly improve protection, new data from the US Centers for Disease Control and Prevention shows. Researchers found that layering a cloth mask over a medical procedural mask, ...

Double masking can improve your protection against the coronavirus. Layering a cloth mask over a surgical mask can improve the fit while maintaining good filtration. However, wearing a surgical mask ...