David Dilling has decades of experience in the air filtration business, but the past year has created more challenges — and opportunities — for him than any time he can remember. The 54-year-old San ...

Researchers at Kyoto University have developed a mask filter that, when exposed to ultraviolet light, shows whether the user has been infected with the virus. Researchers in Japan are developing a ...

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As health officials scramble to minimize spread of the highly contagious Omicron variant, many experts have recommended that people switch from cloth or surgical masks to more-protective N95 and KN95 ...

Airplane filters remove 99% of particles, experts say, which can help keep transmission of COVID-19 low on flights. But face masks provide an additional layer of protection -- especially if you're ...