Dr. Nithipat reveals that the World Health Organization received Covid-19, lost all contacts through the system from inhalation of contaminated aerosols Point the air purifier can be used to reduce the amount.
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Date 22 Aug ’64 Assoc.Prof.Dr. Nithipat Jearakul Head of the Department of Respiratory Disease and Tuberculosis Department of Internal Medicine Faculty of Medicine Siriraj Hospital Mahidol University Giving knowledge about COVID-19, which means that wherever you are, you are in a state of remembrance that the Covid Situation Administration has provided. Thai people will have to endure this epidemic for a long time. The next problem that will be encountered is
We will destroy the pathogen that causes COVID-19. suspended in the air in hospital buildings, workplaces, public places and in homes that use air conditioning systems how can we
After being stubborn for more than a year The World Health Organization has finally recognized that COVID-19 It can be transmitted through respiratory contact (airborne) by inhalation of virus-contaminated aerosols (WHO, 2021b. https://www.who.int/…/novel…/advice-for. -public) Therefore, it is necessary to reduce the spread of infection in closed ventilation buildings.
Many people wonder Can a portable air cleaner (PAC) widely used for filtering PM2.5 be used for this purpose?
According to a study in Spain, using a type of PAC that uses a HEPA filter with a size of 0.1 microns can filter 99.95% of particles for use in rooms with a capacity of up to 82 cubic meters when the unit is left in the middle of the room. (to suck the air around) where there are covid patients can reduce the chance of microbial recirculation in that room by 80% (Science of the Total Environment 2021 Sep 1;785:147300. doi: 10.1016/j.scitotenv.2021.147300. Epub 2021 Apr 29).
However, anyone who is looking for an air purifier to use to reduce the number of coronavirus-2019 in the building must make sure that
1. HEPA filter efficiency
2. Room capacity suitable for the operation of the machine.
and the important thing is How to safely clean or replace the HEPA filter from spreading lingering germs. Because this machine for use at home There is no sterilization system that enters the machine with UV light like those used in hospitals.
For ventilation systems in buildings of hospitals and public places The more you have to pay attention to each other. because if you don’t do it well This will allow the aerosols that are contaminated with viruses to spread easily.
In addition, it may be attached and accumulated along the air duct used to circulate the room. until it may be contaminated with new air added And if there is no air filtration system that is released well It will be dangerous to people outside the building. There has been an attempt to find a method to destroy pathogens, especially the coronavirus disease 2019. that circulates and flows out through the ventilation system in that place It combines the use of a HEPA filter, an electrostatic generation system, and the use of UV light.