Corona molecules in the air … probably contagious

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(AFP) – Scientists have concluded for several months that the emerging corona virus can remain stuck in the spray issued by patients when they speak and breathe without there being any evidence so far that these small particles are contagious.

However, a recent study by scientists at the University of Nebraska and published earlier this week demonstrated for the first time that the SARS-Cove-2 virus particles taken from the air of Covid-19 patients’ rooms were able to reproduce and thus cause infection.

This reinforces the hypothesis that the virus is transmitted not only through coughing or sneezing, but also by speaking in a normal way and breathing, and that infectious particles of the virus can remain stuck for a long time in the absence of ventilation and cross the two-meter distance that is recommended as part of the social spacing procedure.

And the results are still considered preliminary and have not yet been studied by the reading committee in a scientific journal that would confirm the method used by scientists to reach this result. The results were published Monday on the Medrexif website, where the scientific community can comment freely.

However, the team itself had previously published in March a study that showed that the virus remains in the air of hospital patients, and that this study will be published in a scientific journal soon, according to its main target.

“This is not easy,” said Joshua Santarbia, a professor at the University of Nebraska Medical Center on how to collect virus particles in the air thanks to a mobile-sized machine. He added, “The groupings of molecules are weak, and we have generally few opportunities to take a sample that can be used.”

The researchers took samples from the air in the rooms of five patients lying in bed 30 cm above the edge of the bed from the side of the feet. The patients were speaking normally and some were sneezing. Scientists have been able to collect molecules less than five microns in diameter and carry the virus, or even less than a micron.

Then they isolated the virus and placed it in a special environment for reproduction, and concluded that three of the 18 samples tested were able to reproduce.

Professor Santarbia felt that this proves that the small particles in the air that are able to travel greater distances than the larger molecules are capable of causing injury to people.

He said: It multiplies in a cell culture environment and is therefore contagious.

And the scientific community has already recognized the possibility that small particles of the virus can be transmitted through the air, which has led to an increase in calls for masking.







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