Vaccines continue to be used around the world to prevent the spread of the new coronavirus covid19, but the epidemic is still not easy to control.
And until then, using a face mask will be necessary because the virus can be easily transmitted from one person to another.
In particular, a social distance of 2 meters without the use of a face mask within the four walls is not enough to prevent the spread of Covid19.
This was revealed in a medical study in Canada.
The McGill University study also found that using a face mask inside the walls could reduce the risk of getting sick from viral particles in the air by 67%.
The researchers said that the use of face masks and good ventilation systems are crucial to preventing the spread of more mild types of corona.
"Especially with the onset of winter and the onset of the flu season," he said.
He added that a distance of 2 meters within the four walls is not enough to stop the spread of Covid19 and if it is an office or a place where people gather for some time.
The study found that in places where people did not wear face masks, more than 70% of viral particles spread more than 2 meters within 30 seconds.
In contrast, less than 1% of viral particles travel more than 2 meters when using a face mask.
For the research, experts developed a computer program using models to monitor the flow of liquids and gases that could measure the distance of particles emitted during a cough within four walls.
The researchers found that airflow, the way a person sits or stands, and the wearing of a face mask had significant effects on preventing the spread of viral particles.
Cough is said to be one of the most important sources of airborne viruses, and researchers say the research will help understand how viral particles spread through a source and refer policymakers to face masks. Will help make decisions.
The results of the study were published in the medical journal Building and Environment.
