Science

In controlled environment, novel coronavirus can last 28 days on glass, currency: study

A boy sits in front of a mural representing the coronavirus in Bogor, West Java on September 27, 2020.

A boy sits in front of a mural representing the coronavirus in Bogor, West Java on September 27, 2020.

In a very controlled environment the novel coronavirus can survive on banknotes, glass and stainless steel for up to 28 days, much longer than the flu virus, Australian researchers said on Monday, highlighting the need for cleaning and handwashing to combat the virus.

Findings from the study done by Australia's national science agency, CSIRO, was published in Virology Journal .

CSIRO researchers found that at 20 degrees Celsius (68 degrees Fahrenheit) the SARS-COV-2 virus remained infectious for 28 days on smooth surfaces such as plastic banknotes and glass found on mobile phone screens. By comparison, Influenza A virus has been found to survive on surfaces for 17 days.

“It really reinforces the importance of washing hands and sanitising where possible and certainly wiping down surfaces that may be in contact with the virus,” said the study's lead researcher Shane Riddell.

Also read:Widespread use of sanitisers, soaps can worsen antimicrobial resistance: Experts

The study involved drying virus in an artificial mucus on a range of surfaces at concentrations similar to samples from COVID-19 patients and then recovering the virus over a month.

Experiments done at 20, 30 and 40 degrees C showed the virus survived longer at cooler temperatures, longer on smooth surfaces than on complex surfaces such as cotton, and longer on paper banknotes than on plastic banknotes.

Researchers said given that proteins and fats in body fluids can also sharply increase virus survival times, their study may help explain the apparent persistence and spread of the virus in cool environments like meat-packing facilities.

Also read |The Hindu explains: How long does SARS-CoV-2 stay potent?

Australia has fared much better than most other rich nations in combating COVID-19, with a total of about 27,000 infections and 898 deaths in a population of 25 million. The epicentre of the country's second wave of infection, Victoria state, reported 15 new cases on Monday, well shy of a target of less than five which the government has set for the easing of a hard lockdown in the state capital Melbourne. New South Wales, the most populous state, reported six new cases on Monday, five of whom were returned travelers in quarantine.


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Printable version | Jul 2, 2022 3:29:47 pm | https://www.thehindu.com/sci-tech/science/in-controlled-environment-novel-coronavirus-can-last-28-days-on-glass-currency-study/article32832208.ece