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Some experts claim that the possibility of transmission of the infection exists through airborne virus particles.
Researchers have confirmed that the Corona virus can remain active for 28 days on some surfaces, such as banknotes, mobile phone screens, and non-porous stain metals.
A study by a team of researchers from the National Institute of Sciences in Australia confirmed that the SARS-Cove-2 virus can survive for longer periods than previously imagined on some surfaces, and the virus is transmitted mainly due to coughing or sneezing. and speak.
However, some experts say that there is a possibility of transmission of the infection through virus particles scattered in the air or settled on some metal, plastic or paper surfaces.
Previous studies had suggested that the virus would remain active on banknotes for two days and on glass, plastic and metal surfaces for six days. But the recent study found that the virus was very active on these surfaces for up to 28 days, especially on soft-touch surfaces like the glass used to make cell phone screens, as well as in soft plastic packaging. to the touch and paper money.
The researchers noted that these results were achieved after a period of intensive research on the activity of the virus at a temperature of 20 degrees Celsius, which is almost normal room temperature.
Compared to the usual influenza virus, Corona can remain active for 17 days under the same living conditions.
The research was conducted in dark climates where UV rays are known to help kill the virus.
Larry Marshall, director of the institute, said: “Finding out how long the virus remains in the activity phase on different surfaces helps us predict and predict its activity and behavior more accurately and provide more effective solutions to help people avoid the disease. infection”.
The study, published by the “Virology Journal” specialized in virology, found that the virus remains active for a shorter period at high temperatures. The possibility of transmission of infection by contact with some surfaces is limited to a 24-hour period only at a temperature of 24 ° C.
Virus activity persisted longer on smoother, non-porous surfaces than others. The study also found that clothing does not continue to have active and contagious corona viruses for more than 14 days.
Analysis: Balab Ghosh: Scientific Affairs Correspondent
Corona can be transmitted through the air. Studies have found that the virus can remain active in airborne particles for more than three hours, while the possibility of transmission through banknotes and mobile phone screens was less secure.
Previous studies also looked at how long the virus lived on smooth metal surfaces, and their results varied wildly. Some have found that the virus remains active for up to three days, while other studies have confirmed that it remains active for up to 14 days at room temperature.
But the latest study looked at the duration of virus activity on glass, metal, and paper surfaces and found that active viruses can be traced for up to 28 days at room temperature, which is significantly longer than previous studies.
The study was conducted in environments prepared for virus survival, including darkness, stable temperatures and high humidity, which are conditions that are not available to the virus naturally and continuously.
However, the results add more importance to washing your hands regularly and avoiding contact with your face to reduce the risk of infection.
Other results
The researchers found that the ability of the SARS-Cove-2 virus to remain in an active state on smooth metal surfaces at low temperatures could explain the outbreak of infection in meat processing plants and cold food warehouses that had been shown to infect thousands. of workers in them all over the world in the past.
The latest study supported the results of previous studies on the virus that remains active in some fresh and frozen foods.
The World Health Organization says that “there are currently no confirmed cases of the virus due to its transmission through fresh or packaged food,” but the organization does provide some advice and instructions to avoid the risks of transmission through different surfaces.
