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Is someone at home sick with COVID-19? One simple but effective strategy for keeping the virus from spreading is to make your indoor air as much like the outdoors as possible.
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People are worried that the virus could be spread by air conditioning systems. Here's what researchers do — and don't yet — know.
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As U.S. cities are experiencing some of the warmest temperatures on record, it's easy to take for granted the ability to feel almost instant relief from…