How the Coronavirus is spreading through the air?
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• Lack of GOOD VENTILATION: Good ventilation could be the key to avoiding coronavirus as winter approaches and people spend more time indoors. Good ventilation matters in five ways.

1) If it's stuffy, walk away: Not enough fresh air is being introduced, which increases your chances of getting infected by coronavirus. Recent research shows that in confined spaces there can be "airborne transmission" of the virus - with tiny virus particles lingering in the air.

2) Look up at the air conditioning: Split air conditioner draws in air from a room, chills it and then blows it back out again. This is no problem for a quick visit but maybe a risk over a period of hours.

3) Ask about the 'fresh air ratio': Having 100% outside air or close to 100% is a good thing. The more fresh air, the less you're running the risk of recirculating the virus through the building.

4) Check if there's virus in the filters: If the filters had been checked more frequently, the presence of the virus might have been spotted sooner.

5) Watch out for draughts: If someone sitting beside an open window turns out to be infectious, they could shed virus to others downwind. More fresh air, in general, is better but if it's flowing horizontally and full of virus it could have unintended consequences.

• SHOUTING, SINGING, SPEAKING LOUDLY

1) People exhale 50 times more virus when shouting: People need to understand that this virus is in the air and that they breathe out 50 times more virus when they are shouting or speaking loudly.

2) Speaking quietly could reduce transmission risk by 5X: Quiet talking can reduce transmission through small droplets or aerosols by a factor of five, compared to yelling. If a person remains completely silent, the risk of transmission drops further by a factor of 50.

3) Shutting up could make our surroundings safer: It is important to understand the purpose of wearing masks, which is to block viral particles from being inhaled or exhaled. It is only augmented by recognizing that if we just shut up (if and when possible), we could make our surroundings safer.

• Many factors can affect the chances that infection will spread from one person to another. These factors include whether or one or both people are wearing masks, whether the infected person is coughing or showing other symptoms, and whether the encounter occurred indoors or outdoors. Though the "15 minutes within six feet rule" is a helpful guideline, it's always best to minimize close interactions with people who are not members of your household.

Source: https://english.elpais.com/society/2020-10-28/a-room-a-bar-and-a-class-how-the-coronavirus-is-spread-through-the-air.html?fbclid=IwAR3o-ck_slh21xrGXpK489hQoBC3Zy1gwuMlhz9OL1C5GIiwvu3PH0tEaV4
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