How long can the coronavirus last on a piece of paper or clothing or even inside someone’s home?
Channel 11′s Jillian Hartmann went to an infectious disease doctor to get that answer.
“Those are things that are currently being worked out, but it looks like in certain cases it can live for several days,” said Dr. David Weber.
Weber has been working closely with the Pennsylvania Department of Health and UPMC since the pandemic started.
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To minimize the spread as much as possible, he says frequently wash your hands, don’t touch your face and try to stay 6 feet away from others.
“That seems to be about how far the virus is carried,” Weber said.
And he says, outside of hospitals, masks and gloves aren’t as effective as you may think.
“The second you put your hand underneath the mask, it’s basically worthless,” Weber said.
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At this time, Weber knows it’s necessary for families to get food at the grocery store or medicine at the pharmacy. So if you have to run an errand, try to limit contact with others as much as possible.
The new coronavirus can live in the air for several hours and on some surfaces for as long as two to three days, tests by U.S. government and other scientists have found.
Their work, published Wednesday, doesn't prove that anyone has been infected through breathing it from the air or by touching contaminated surfaces, researchers stress.
“We’re not by any way saying there is aerosolized transmission of the virus,” but this work shows that the virus stays viable for long periods in those conditions, so it’s theoretically possible, said study leader Neeltje van Doremalen at the National Institute of Allergy and Infectious Diseases.
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Since emerging in China late last year, the new virus has infected more than 120,000 people worldwide and caused more than 4,300 deaths -- far more than the 2003 SARS outbreak caused by a genetically similar virus.
For this study, researchers used a nebulizer device to put samples of the new virus into the air, imitating what might happen if an infected person coughed or made the virus airborne some other way.
They found that viable virus could be detected up to three hours later in the air, up to four hours on copper, up to 24 hours on cardboard and up to two to three days on plastic and stainless steel.
Similar results were obtained from tests they did on the virus that caused the 2003 SARS outbreak, so differences in durability of the viruses do not account for how much more widely the new one has spread, researchers say.
The tests were done at the National Institutes of Health’s Rocky Mountain Lab in Hamilton, Montana, by scientists from the NIH, Princeton University and the University of California, Los Angeles, with funding from the U.S. government and the National Science Foundation. The findings have not been reviewed by other scientists yet and were posted on a site where researchers can quickly share their work before publication.
"It's a solid piece of work that answers questions people have been asking," and shows the value and importance of the hygiene advice that public health officials have been stressing, said Julie Fischer, a microbiology professor at Georgetown University.
"What we need to be doing is washing our hands, being aware that people who are infected may be contaminating surfaces," and keeping hands away from the face, she said.
As for the best way to kill the virus, “it’s something we’re researching right now,” but cleaning surfaces with solutions containing diluted bleach is likely to get rid of it, van Doremalen said.
The Associated Press contributed to this report.
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