Whether the place is the office, cafe, school or university, there is often little air movement inside the enclosed spaces.
If one spends a long time in a crowded, closed place, he is at great risk of contracting HIV.
Virologists believe that the transmission through the air is the reason behind the recent wave of corona virus outbreaks in meat factories, in places such as Germany, the United States and England.
In order to cool the air in such places, it is pulled out of the room, cooled and then pumped in again, explains cleanliness and public health expert Martin Exner from the University of Bonn in Germany.
Exner notes that high-quality filters and UV rays may prevent viruses from spreading through such a system in the future.
Recommended Exner filters, also known as HEPA filters, have been used for many years in hospital operating rooms, for example.
Hospital health expert Michael Beach, from the University of Mainz in Germany, says it consists of several layers of synthetic fibers on top of each other. The filter can separate the corona virus particles through several physical effects on the fibers.
UV rays can kill bacteria and viruses. However, it is a means that is not nearly suitable for purification of rooms, because in order for the rays to be effective, the distance between the source of the rays and the substance must be between ten to thirty centimeters, according to Beech.
He adds: "Air purification will be possible only if the air is moved, and therefore the germs pass over through the source of the radiation." However, in the food industry this process can be used effectively through disinfection in the packaging process, for example.
Although everyone has heard this countless times, wearing a muzzle and maintaining a safe distance is still crucial in preventing the spread of a virus infection. Even a homemade muzzle will significantly reduce spray and protect those around you.