As campus emptied amid the COVID-19 pandemic, small groups of volunteers took to Bartels Hall to help sew surgical masks — aid for local medical facilities during a massive supply shortage. The effort ...

Do masks work? And if so, should you reach for an N95, a surgical mask, a cloth mask or a gaiter? Over the past year and a half, researchers have produced a lot of laboratory, model-based and ...

We thought we were almost done with masks. Then omicron hit, reminding us that even with vaccines, COVID is likely to stick around as an endemic, resurfacing with new variants. And so cyclical masking ...