Jan. 19, 2021 — Abraar Karan, MD, has been treating COVID-19 patients for 10 months. In that time, he hasn’t gotten the virus, and he credits his N95 mask for protecting him.

“I’ve seen more COVID patients than I can count since March, and I get tested regularly, and I’ve not tested positive. I want others to have that kind of protection, too,” says Karan, an internal medicine doctor at Brigham and Women’s Hospital and Harvard Medical School.

Credit: Debora Cartagena CDC

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