Chet Fortune works out using an altitude training mask at to increase his lung capacity. Fortune is a co-owner of Warrior Fitness Center in La Vista. Video: Weird mask, great workout In April, a few ...

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Coronavirus disease 2019 (COVID-19) can be asymptomatic or cause a wide variety of clinical symptoms. Approximately 80% of patients have mild or moderate symptoms, but the 20% remaining develop severe ...