In the comments appearing in the Journal of Clinical Infectious Diseases of the Oxford University Press The researchers write that the results of the study show that "There is no doubt," the virus can travel in the air up to 10 meters and the analysis of the spread of the disease in some cases. Find the same fact as the SARS-CoV-2 virus, which is the cause of Covid-19's disease.
"Frequent hand washing And social spacing is appropriate But in our view, it's not enough to protect against airborne droplets that have the virus that is released into the air by the infected people. " One of the experts who wrote the article.
Expert advice There are both raising the efficiency of ventilation systems for the indoor environment, using high efficiency air filters And use ultraviolet lamps As well as avoiding the gathering of large crowds in buildings and public transport
When an infected person coughs or sneezes They will spray out various sizes. By droplets that are larger than 5 to 10 micrometers, they will fall quickly within a radius of 1 to 2 meters, but smaller droplets Can stay in the air for a long time and drifts farther than that
There is intense debate in the scientific community about how small droplets can spread the virus in the context of Covid-19. But until now, the World Health Organization believes that it may occur in special circumstances in hospitals. For example, when the patient must wear a ventilator tube
On the other hand, some epidemiological studies reveal that the spread of the virus through small droplets is not limited to hospitals. It seems that the airflow from the air conditioner will be the source that blows a new species of corona virus to spread. In which it used to cause the infection of Covid-19 Distributed to other desks In a Chinese restaurant in March Causing many customers of the shop to get infected
In the article, the authors agree that the evidence for the transmission of small droplets is not complete. But claiming that the evidence of large droplets and surface transmission is not complete either But is still included in the prevention measures recommendations "As a precautionary principle We should pay attention to every possible path that is important in every attempt to slow down the spread of Covid-19. "
This document was released while various countries Relax, lock down Bring people back to work While students and students return to the school and university fence "We hope that our statement will increase awareness that the air spread of Covid-19 Is the real risk And above all Various control measures Should be used in addition to other precautionary measures "
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