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NOVA
What We Know and Don’t Know about the Coronavirus
Here’s what you need to know about the SARS-CoV-2 virus and the disease it causes, called COVID-19. UPDATE: Preliminary studies suggest the coronavirus spreads from people with no symptoms. A March 17 study shows the virus can remain viable in aerosols for 3 hours, on cardboard for up to 24 hours, and on plastic and stainless steel for 2 to 3 days.
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