New year, same rules: The science behind masks, ventilation and keeping a distance | Health24

Wearing a mask, washing your hands, good ventilation and keeping your distance all help to lower your chances of getting infected by the virus that causes Covid-19.

Covıd 19

2022-01-26 09:30:00 AM

Scientists think COVID19 may be here to stay. This is why vaccines, masks, physical distancing and ventilation can be the key to keeping you safe while getting back to a more normal life. | Bhekisisa_MG

Wearing a mask, washing your hands, good ventilation and keeping your distance all help to lower your chances of getting infected by the virus that causes Covid-19.

A 2020 study of air samples taken around Covid patients confirms that aSamples taken at the door to the room showed just over two copies of virus per litre of air., which makes the droplets go further and hang around in the air longer than when you simply breathe in and out.

- about the length of your arm. As larger respiratory droplets will contain more viral particles if someone is infected, the guideline of keeping about two metres apart makes sense, because it reduces your chance of being exposed to a large amount of virus from the infected person.

Read more: News24 »

PODCAST | What if a pro-black group wanted to use the old SA flag?

It could be used by a black-led movement to critique the ANC. We explore this hypothetical case Read more >>

Bhekisisa_MG This shit is becoming like Anaconda on eTV. Leave us alone Bhekisisa_MG It’s not about a virus! It’s a cult of making money from a lie Bhekisisa_MG Hysuka!

Google pushes new plan to overhaul web-tracking cookiesGoogle on Tuesday announced a new plan to stop using small files known as cookies to track people's web browsing habits after its previous proposals were roundly criticised. As a mother of two kids I have battled alot with my financial state to the point of begging from friends just to survive,until I started Bitcoin trading with the help of _AMBREYMARCUS1 I made a successful withdrawal of R 200,000 with the help of _AMBREYMARCUS1 . I'm here to show my appreciation to TarellaCampbel who took me out from zero to hero. I'm so glad to be among your winning team ma'am and I will always show my gratitude and work with you always.

Zimbabwe opposition leader Nelson Chamisa forms new political partyZimbabwe’s main opposition leader Nelson Chamisa has formed a new political party, Citizens Coalition for Change. Party 2 Tseisi_Mashudu PutSouthAfricansFirst MovementOfPeopleByPeopleForPeople ReleaseHomeAffairsAuditNow ReleaseHomeAffairsAuditNow ReleaseHomeAffairsAuditNow ReleaseHomeAffairsAuditNow ReleaseHomeAffairsAuditNow ReleaseHomeAffairsAuditNow What are this chap's policies tendaim65

Zimbabwe opposition leader Nelson Chamisa forms new political partyZimbabwe’s main opposition leader Nelson Chamisa has formed a new political party, Citizens Coalition for Change. Unfortunately, it won't help him;the 2023 elections are already rigged in ZANUPF_Official favor! And the head office will be in sandton South Africa 🇿🇦 He will form more political parties until he retires from politics.

Zimbabwe opposition leader Nelson Chamisa forms new political partyZimbabwe’s main opposition leader Nelson Chamisa has formed a new political party, Citizens Coalition for Change. The reality is that in Zimbabwe...🚮🚮

SA records 1,330 new Covid-19 cases, 88 deaths in 24 hoursIn total, there have been 3,582,691 laboratory-confirmed cases since the outbreak of the virus in March 2020, and 94,265 confirmed fatalities to date. I'm here to show my appreciation to TarellaCampbel who took me out from zero to hero. I'm so glad to be among your winning team ma'am and I will always show my gratitude and work with you always. There is no greater joy than having financial stability and a life free of debts, that’s why I keep tweeting about GregsonLillian has been a pleasure collaborating with you...there is no other way I can show my appreciation other than tweeting the good deed you have done.

SA records 1,330 new Covid-19 cases, 88 deaths in 24 hoursIn total, there have been 3,582,691 laboratory-confirmed cases since the outbreak of the virus in March 2020, and 94,265 confirmed fatalities to date. We're back at counting We are over the fear and panic. Stop it now as no one cares anymore

aerosols concentrate around the person who is the source . Thinking about a smoker in an indoor space is a good analogy - the smoke will first collect around them, but over time it will spread to fill the room. A 2020 study of air samples taken around Covid patients confirms that a higher dose of virus exists in the air close to an infected person . Researchers found that the air near patients’ noses contained up to 48 copies of the virus per litre of air, whereas the concentration dropped about 10 times in samples taken some distance away from the hospital bed. Samples taken at the door to the room showed just over two copies of virus per litre of air. Many factors influence how far respiratory droplets can travel. When you sing, sneeze or cough, you exhale with more force , which makes the droplets go further and hang around in the air longer than when you simply breathe in and out. Although tiny vaporised droplets can travel up to eight metres after you sneeze, larger droplets tend to fall fairly quickly within a distance of one or two metres - about the length of your arm. As larger respiratory droplets will contain more viral particles if someone is infected, the guideline of keeping about two metres apart makes sense, because it reduces your chance of being exposed to a large amount of virus from the infected person. But researchers caution that there should be , depending on the setting. Too short a distance could risk avoidable infections, whereas too long a distance could be unnecessarily disruptive to work and social lives. Should I choose an indoor gathering or an outdoor event? It depends - and you should choose wisely. The concentration of virus-carrying particles is almost always lower outdoors than indoors , because, as McCarthy explains, a slight breeze or airflow outside naturally dilutes the concentration of infectious particles. But, she says, “a packed soccer stadium, with every seat filled, is not likely to be safe, even though it's outdoors”. In a crowded setting, like a sports stadium filled to capacity and with spectators shouting and cheering close to one another, people can easily inhale someone else’s respiratory droplets. And if the person next to you is infected, being so close can up your chances of becoming infected too. Because - yes, we’ll say it again - it’s all about the dose. McCarthy suggests having a number of empty seats between people or even leaving adjacent rows empty as a countermeasure at outdoor events. Simply put, “stadiums shouldn't be full,” she warns. So what about indoor gatherings? “We're at the mercy of the ventilation systems of that venue,” says McCarthy. In indoor settings without good airflow, the concentration of virus-containing particles can be high . And higher concentrations mean there is more chance of inhaling a large dose of virus and getting sick if you’re in that space. McCarthy says we should try to control the airflow as much as we can when we gather inside, for example by opening windows. Good airflow helps to “dilute these particles and reduce the chances that I might breathe in an infectious particle”. In indoor settings such as in a mall or at the movies, the air conditioning system controls the number of air changes per hour. This is the number of times the air in a room is completely replaced by air from outside in an hour . More frequent air changes reduce the likelihood that you can inhale viral particles from a sick person and get infected. Says McCarthy: “If we are to make indoor settings safer, facilities managers must know the importance of good ventilation and how to maintain the systems that clean or recycle air.” What if I can’t avoid close contact? Then do what you can - taking at least some Covid precautions is better than none. We should think of non-pharmaceutical measures being like different parts of an anti-Covid armour, giving us an extra layer of protection with each piece we put on. In spaces where groups of people gather - whether at school, the office or church - it’s best to try and keep