Researchers said the findings reinforce the importance of effective cleaning and handwashing to curb the spread of the disease.
The findings from Australia's national science agency, the CSIRO, appeared to show that SARS-CoV-2 can survive on surfaces for significantly longer than many had anticipated.
A worker cleans the seats in a cinema hall as part of preparations for a possible reopening after the government eased the lockdown restrictions previously imposed due to the Covid-19 coronavirus, in Chennai on October 8, 2020. The virus responsible for Covid-19 can survive for up to 28 days on surfaces such as glass, steel, vinyl, paper and polymer banknotes,
The researchers tested the survival rates of the virus, dried in an artificial mucous solution, at three different temperatures on six common surface areas. All the experiments were carried out in the dark, however, since UV light has already been shown to kill the virus. To date, more than 37.4 million people worldwide have contracted the coronavirus, with 1.07 million related deaths, according to data compiled by Johns Hopkins University.CSIRO researchers tested SARS-CoV-2 on several surfaces at 20 degrees Celsius, 30 degrees Celsius, and 40 degrees Celsius, with the relative humidity kept at 50%. The surfaces used in the study were stainless steel, glass, vinyl, paper and polymer banknotes, and cotton cloth.
The virus stopped being infectious within 24 hours on some surfaces when tested at 40 degrees Celsius. At 30 degrees Celsius, the virus' viability fell to three days on cotton and vinyl, and seven days on glass, steel and polymer banknotes.
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