TUESDAY, July 20, 2021 (HealthDay News) -- Breathing in smoke from wildfires may significantly increase the spread of COVID-19, researchers say. The warning, from a new study of links between smoke-caused air pollution and SARS-CoV-2 infections, comes as firefighters battle 80 large wildfires in the western United States. The largest — 300 miles south of Portland, Ore. — covers over 500 square miles.
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