According to research released late last year by the government's Scientific Advisory Group for Emergencies (SAGE), it was established that a well ventilated room can clear up to 70 per cent of virus particles in the air so the need for people to either open windows regularly for 15 minutes at a time or leave it all times.
Researchers believe the quality of our indoor air is equally as important as food and water to protect against the transmission of disease. And also calling the governments to make it enforceable for widows to be opened especially public buildings
This could not only help to prevent future pandemics, but also slow the spread of other airborne diseases such as flu and colds they say.
Yet many of us don't seem to have got the message.
Data suggests that most people think ventilation is less important than Hands, Face, Space, but in many ways ventilation is the most important thing in person's life.
Being indoors with someone infected, with no fresh air, the particles can remain in the air for hours and build up over time.
Investigations showed the virus had escaped from the room of an infected person in quarantine via a gap under the door, travelling down the corridor where it infected a security guard whose post was several rooms away.
So why do we pay such little attention to ventilating our buildings properly?
Most people have developed a culture of airlock, particularly in air conditioned, central-heated offices, where either no one thinks to open a window.
This is particularly true as evidence shows that people who are able to spread the disease to a disproportionately large number of others do this in enclosed indoor spaces such as pubs.
Portable air purifiers or cleaners filter impurities out of the air around us.
One of the chief issues with poor air flow in any building is that it allows indoor air pollution to build up. This consists of gases such as nitrogen dioxide and carbon monoxide and particulate matter (PM), for example, soot and dust.
The sources range from gas cookers and central heating to chemicals found in cleaning and personal care products, adhesives, paints and cigarette smoke.
These can contribute to a range of lung diseases including chronic obstructive pulmonary disease (COPD), a group of progressive lung diseases such as emphysema and asthma.
This is thought to be because the carbon dioxide we breathe out can build up in a sealed room, making us sluggish and drowsy.
So it's very good for people to get into the habit of opening windows (and using extractor fans) especially when they cook or use chemicals such as aerosols.
It's also a good idea for people to make an effort to reduce the amount of chemicals they use at home. Example is limiting the aerosols you use.
Now is the time to apply the lessons we have learned from Covid-19 and to look at the ways we can transform our indoor air.
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