Airborne virus transmission in indoor environments
Particulate matter and harmful gases in the air are generally bad for human health. In times of virus outbreaks, such as the current COVID-19 pandemic, the focus is increasingly on the air we breathe. Virologists agree that the corona virus spreads mainly through respiration and only to a lesser extent through smear and droplet infection.
When speaking and breathing out through the mouth, thousands of aerosols (tiny saliva particles) are ejected into the room in a kind of spray. These particles, invisible to the eye, fly further than the recommended minimum distance of 1.5 - 2.0 m and remain suspended in the air for several hours. People suffering from corona disease release viruses with these suspended particles through the air they breathe. If infectious aerosols are inhaled by other people, the viruses penetrate deep into the lungs via the airways.
Ensure frequent air exchange in your interior spaces
Airborne transmission mostly occurs in indoor environments where people spend over 90% of their time. One thing that is recommended these days is the regular airing of interiors. Even before COVID-19, the pollutants in the indoor air can be up to five times higher than outside. During a global pandemic, it is also necessary to reduce the concentration of airborne viruses indoors. By exchanging the indoor air with fresh air from outside, carbon dioxide exhaled by people and, in the case of infected persons, the concentration ofviral aerosols will be reduced.
Use mobile air cleaners with HEPA* H14 filters or upgrade your HVAC system with HEPA
However, adequate airing is sometimes not possible because of closed or too small windows. Or, ventilation is often simply forgotten. Therefore, it is recommended to support the air exchange with professional air filtration systems. This can be done by the use of suitable filters in an HVAC system or with the help of stand alone professional air purifiers, or a combination of both.
*according to ISO 29463 and EN 1822
Impact of particulate matter and harmful gases on health
People with COVID-19, and who are frequently exposed to high levels of particulate matter, have an increased risk of serious illness or death from the disease, according to a recent study by the Harvard T.H. Chan School of Public Health.
For certain groups, the risks from pollutants are above average. People with respiratory diseases, elderly people, or children should not be exposed to increased concentrations of particulate matter or harmful gases.
Clean air is a basic requirement for good quality of life. Wherever people study, work, shop, or spend their leisure time, they should be surrounded by clean air. But ever since the COVID-19 outbreak, this cannot be taken for granted anymore.