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How long can Coronavirus survive on surfaces?

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Survival of Corona Virus in the Air and on the Surfaces Research done at the National Institute of Health, USA Published   in the New England Journal Of Medicine 17 March 2020 https://www.nejm.org/doi/full/10.1056/NEJMc2004973?query=RP The scientists at the NIH have researched the behavior of the Covid-19 related corona virus in the laboratory and compared it to the SARS related virus (another corona virus). The authors caution that the results should be interpreted with caution because of variables and the fact that the data is based on simulated laboratory environments. For the full article, please use the link to the medical journal provided above. What I learn from this laboratory study is that SARS and the Covid-19 related viruses were compared in the lab as to how long they hung on in the air or on various surfaces, they behaved similarly. The authors state that perhaps the difference between SARS and Covid-19 depends on the amount of virus particles coughed...