Editor : Xia Mingyi / Publisher : NTDTV / https://www.ntdtv.com/gb/2020/10/12/a102961324.html / Translation, editting : Gan Yung Chyan, KUCINTA SETIA
Image : Australian researchers said that the virus that causes the disease COVID-19 (covid) is "extremely tenacious" at 20 degrees Celsius and can survive on banknotes, mobile phone screens, and stainless steel surfaces for up to 28 days. Schematic (Mario Tama/Getty Images)
Australian researchers said that the novel coronavirus (SARS-CoV-2, covi in short) that occurred in 2019 is "extremely tenacious" at 20 degrees Celsius and can survive on banknotes, mobile phone screens, stainless steel and other surfaces for up to 28 days. In contrast, influenza viruses can only survive for 17 days in the same environment.
The Central News Agency quoted the British Broadcasting Corporation (BBC) as a report that Australia’s largest national scientific research institution, the Australian Commonwealth Scientific and Industrial Research Organization (CSIRO), showed that covi can live longer than originally thought.
Ultraviolet rays have long been proven to kill viruses, but this experiment was carried out in the dark. Some experts also questioned the actual risks posed by the spread of viruses on the surface of objects in real life.
SARS-CoV-2 is mostly spread when coughing, sneezing and talking, but there is also evidence that it can be spread by suspended particles.
According to the Centers for Disease Control and Prevention (CDC) of the United States, touching the surface of objects such as metal or plastic may also be infected with the virus on it and develop covid. However, it is believed that this route of infection is not common.
●Research content?
Previous laboratory tests found that covi can survive for 2 to 3 days on banknotes and glass surfaces, and up to 6 days on plastic and stainless steel surfaces, but the results of the study vary.
However, the Commonwealth Scientific and Industrial Research Organization of Australia found that this virus is "extremely tenacious" and can survive 28 days on smooth surfaces such as mobile phone screens and plastic banknotes and banknotes at 20 degrees Celsius or room temperature and in the dark. In contrast, influenza viruses can only survive for 17 days in the same environment.
The study published in the Virology Journal also found that SARS-CoV-2 has a shorter survival time in hotter environments; on some surfaces, the virus at 40 degrees Celsius within 24 hours is not contagious.
The virus can survive on the surface of smooth, non-porous materials longer than that of porous materials such as cloth.
●Where are the differences?
Ron Eccles, the former director of the Cold Center at Cardiff University in the United Kingdom, criticized the research, saying that covi can survive for 28 days has caused unnecessary panic among the public.
He said: "The virus will spread from dirty hands to the surface of objects through coughing and sneezing mucus. This study did not use fresh human mucus as a vector for spreading the virus. Fresh mucus is a hostile environment for viruses because it contains a lot of white blood cells produce enzymes to destroy viruses, and they also contain antibodies and other chemicals to neutralize viruses."
He also said: "I think the infectious virus will only survive in the mucus on the surface for hours instead of days."
Emanuel Goldman, a professor of microbiology at Rutgers University in the United States, said in a study published in the medical journal "The Lancet" in July: "The probability of transmission through the surface of inanimate objects is very small. "Monica Gandhi, a professor of medicine at the University of California, said last week that covi will not spread through surfaces.
●Research highlights the importance of washing hands and cleaning the touch screen
This new study observes how long the new coronavirus can survive on the surface of glass, paper and plastic banknotes, and found that it can live for 28 days at 20 degrees Celsius, which is much longer than previous studies. However, the experiment was conducted under virus-friendly conditions, including in a dark room and the temperature and humidity are stable, so the virus may not be so good in the real world.
Even so, these results still highlight the need to wash hands and clean the touch screen frequently to avoid touching the face and help reduce the risk of infection.
The authors of this study said that SARS-Cov-2 can survive on stainless steel at lower temperatures, which may help explain why meat processing and cold storage facilities may have covid outbreaks . These researchers also said that their findings support previous research claims that the virus can survive on fresh and frozen food.
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