U.S. Study Indicates Coronavirus May Survive In The Air For Up to 3 Hours, 3 Days On Certain SurfacesChris Menahan
Mar. 12, 2020
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A federally funded study reportedly found the coronavirus may survive in the air for up to three hours and survive on surfaces like plastic and stainless steel for some three days.
From The Hill, "Tests indicate coronavirus can survive in the air":
A study awaiting peer review from scientists at Princeton University, the University of California-Los Angeles and the National Institutes of Health (NIH) posted online Wednesday indicated that the COVID-19 virus could remain viable in the air "up to 3 hours post aerosolization," while remaining alive on plastic and other surfaces for up to three days.Here's excerpts from the full study:
We found that viable virus could be detected in aerosols up to 3 hours post aerosolization, up to 4 hours on copper, up to 24 hours on cardboard and up to 2-3 days on plastic and stainless steel. HCoV-19 and SARS-CoV-1 exhibited similar half-lives in aerosols, with median estimates around 2.7 hours. Both viruses show relatively long viability on stainless steel and polypropylene compared to copper or cardboard: the median half-life estimate for HCoV-19 is around 13 hours on steel and around 16 hours on polypropylene. Our results indicate that aerosol and fomite transmission of HCoV-19 is plausible, as the virus can remain viable in aerosols for multiple hours and on surfaces up to days."In ongoing experiments, we are studying virus viability in different matrices, such as nasal secretion, sputum and fecal matter, and while varying environmental conditions, such as temperature and relative humidity," the researchers said.
Some early indications and speculations have suggested the virus may be suppressed by high absolute humidity (i.e. 72 degrees Farenheight inside with 50% relative humidity obtained with a humidifier) and may slow down in spring and summer depending on local climates.
Dr. Joseph G. Allen shared similar general advice in the New York Times last week:
A study published just last year found that ensuring even minimum levels of outdoor air ventilation reduced influenza transmission as much as having 50 percent to 60 percent of the people in a building vaccinated.Consider getting a humidifier and waiting 24 hours before opening delivered packages.
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