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Since the beginning of the COVID-19 pandemic, scientific dispute about routes of SARS-CoV-2 transmission has continued. It has been generally accepted that transmission occurs through direct contact and respiratory droplets traveling “short-range” (1–2 meters). However, anecdotal evidence indicates that airborne transmission over longer distances may also occur via virus-containing aerosols with much smaller particle size than droplets. British researchers conducted a systematic review of 18 observational studies through January 2022 that reported on SARS-CoV-2 transmission events (primarily outbreak investigations) in non-healthcare indoor community settings in which long-distance (>2 m) airborne transmission was the most likely route.
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