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The TRUTH of How Coronavirus Spreads and How to Prevent Coronavirus | Airborne Transmission

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The TRUTH of How Coronavirus Spreads and Coronavirus Prevention | Airborne Transmission

The TRUTH of How Coronavirus Spreads and Coronavirus Prevention | Airborne Transmission
#coronavirus #covid19

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Coronavirus Update : Coronavirus Transmission Through Air
It’s becoming clearer and clearer now, that this coronavirus spreads not just through contact and respiratory droplets that fly through the air like ballistics, but also it's being transmitted through the airborne route, meaning through aerosol, meaning the virus lingers in the air, and then someone inhales the virus. This is known as airborne transmission.

Let’s face it, there is a reason why hospitals with designated COVID-19 areas require everyone to wear an N95 respirator mask, as well as eye goggles. That’s because we know that this virus has the potential for airborne transmission. During normal breathing and speech, tiny particles are emitted mainly from the mouth. These particles can range in size, with the smallest being less than a micron (1 um), and the biggest being over 500 um in diameter.

To put some perspective on that, the average diameter of human hair is about 80 microns). Typically droplets that are less than 5 um are considered small, and its these small droplets that can be suspended in the air. Droplets that are over 100 um are considered large, and between 5 and 100 microns is intermediate. But the reality is, it’s a range of sizes, it’s a continuum, from less than 1 um to over 500 um. And more and more particles are emitted when someone is breathing heavier, such as with exercise, …..or if someone is coughing or sneezing, or if someone is shouting or singing.

Due to gravitational forces, particles that are bigger than 5 microns tend to settle, meaning fall down on surfaces such as the floor, and they fall fairly close to the source, typically within 6 feet. This is why the CDC recommends 6 feet for social distancing. But here’s the thing, sometimes these larger particles travel further than that, especially if someone is breathing heavy, or shouting, or singing, or coughing, or sneezing. Typically they fly no further than 12 feet in these situations. But we’re also spraying particles that are smaller than 5 microns, and its tiny particles that don’t act like ballistics, they act more like a gas cloud, where they float in the air, and travel up to 27 feet. The ones that are less than 1 um evaporate within milliseconds of hitting the air, while the particles that are more than 100 um can take up to a minute to evaporate.

What happens when the droplets that are less than 5 microns, what if they are spewed from someone who is infected with the virus, and all of a sudden in midair, they evaporate? Well, they dry out, and you’re left with a virus that is floating in the air. These are called droplet nuclei, aka aerosols. There are lots of factors that determine how long aerosols remain in the air. It depends on the person who emitted the particles, how they emitted them, the temperature, and humidity of the environment. Lack of airflow means this cloud will persist longer. And when this moist cloud finally does dissipate, you’re still going to have droplet nuclei that stay airborne….for about 3 hours, based on that NIH study.
At this point, we might not have 100% conclusive evidence that proves airborne transmission, but there are now several studies that strongly suggest that to be the case. Now just because we know that this virus spreads through the airborne route, that’s not to say that it doesn’t spread through contact and respiratory droplets, meaning the bigger droplets that act like ballistics. It spreads by all 3 of these mechanisms.

So handwashing is still important. As is not touching your face or mask with dirty hands. And maintaining 6 feet apart is a good thing, but its not good enough for certain situations. Remember earlier how I said when someone sneezes, that moist cloud containing aerosols can travel up to 27 feet?, And the virus can linger in the air for 3 hours. Some rooms have adequate ventilation that supplies clean outdoor air and minimizes recirculated air. The better the ventilation, the less likely the spread of aerosols. And even cracking open a window can make a huge difference, and having a fan blowing is good too. Other measures can help too, like having an air purifier with high-efficiency air filtration, and germicidal UV lights.

Dr. Mike Hansen, MD
Internal Medicine | Pulmonary Disease | Critical Care Medicine
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Why is the Coronavirus Spreading So Quickly? | McFarland Clinic

What is the coronavirus (COVID-19) and why does it seem to be spreading so quickly right now? Dan Fulton, MD of McFarland Clinic Infectious Diseases has the answers. Learn more about Coronavirus and what McFarland Clinic is doing to respond at
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COVID 10: Is COVID-19 an airborne disease? Will we all need to wear face-masks against SARS-CoV-2?

There seems to be a lot of confusion in the droplet versus aerosol discussion and how these relate to the spread of COVID-19. Is it airborne and inhaled or droplet based via fomites and hands? The uncomfortable truth is that we have evidence for both modes.

In this video we first define what a droplet and an aerosol is based on their behaviour in the environment. We then examine both through the findings from two published studies. We will also discuss how long viral particles survive and stay viable and able to infect after they fall on a surface or get suspended in the air.

For COVID-19, we agree that the various transmission routes may predominate in different settings. The airborne route is relevant for hospitals and hospital staff as well as crowded and badly ventilated public spaces. Everyone else is more likely to get the virus through touching surfaces, bad hand hygiene and then touching their face.

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Links for reference:




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More updates by Dr. Wiesbauer:
COVID-19 Update 1: How to tell if a pandemic is likely to occur or not–R0 and the serial interval:
COVID-19 Update 2: How to stop an epidemic - Herd immunity:
COVID-19 Update 3: Symptoms of COVID-19:
COVID-19 Update 4: Clinical characteristics of COVID-19:
COVID-19 Update 5: Estimating case fatality rates for COVID-19:
COVID-19 Update 6: Seasonality: will COVID-19 go away in the summer?:
COVID-19 Update 7: This is probably the most important picture of the whole Coronavirus-epidemic:
COVID-19 Update 8: Zinc and chloroquine for the treatment of COVID-19?:
COVID-19 Update 9: Hydroxychloroquine and azithromycin for the treatment of COVID-19–Review of study by Didier Raoult:
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How coronavirus spreads outdoors vs. indoors

Can a runner give you Covid-19?

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If you want to stay totally safe from Covid-19, and eliminate the risk of either getting it or transmitting it, you have to stay home. But as the weather gets warmer, public places start to open up, and many places enter their fourth month of life under coronavirus, that’s becoming less and less realistic.

At the same time, we know that coronavirus can be transmitted through the air -- and that raises some pretty big questions. Is it safe to go the beach? What about a park? Is a heavy-breathing runner going to infect you as they pass you? In short: How do you go outside safely?

Read Vox reporter Sigal Samuel’s article about the risks of transmitting Covid-19 outdoors:

A helpful chart for thinking through the risks of different scenarios when it comes to Covid-19:

The CDC’s study about the Guangzhou restaurant where one person transmitted the virus to several others:

And the study of the 318 outbreaks in China:

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Corona Virus Disease / COVID-19: Sahi aur Galath coronavirus disease ke baare me ( HINDI ) - Part 1

How to Obtain a Nasopharyngeal Swab Specimen for COVID-19 suspected patients
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Corona Virus Disease / COVID-19: Facts and figures for Public Awareness

How COVID-19 Spreads
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Person-to-person spread
The virus is thought to spread mainly from person-to-person.

Between people who are in close contact with one another (within about 6 feet).
Through respiratory droplets produced when an infected person coughs or sneezes.
These droplets can land in the mouths or noses of people who are nearby or possibly be inhaled into the lungs.

Can someone spread the virus without being sick?
People are thought to be most contagious when they are most symptomatic (the sickest).
Some spread might be possible before people show symptoms; there have been reports of this occurring with this new coronavirus, but this is not thought to be the main way the virus spreads.
Spread from contact with contaminated surfaces or objects
It may be possible that a person can get COVID-19 by touching a surface or object that has the virus on it and then touching their own mouth, nose, or possibly their eyes, but this is not thought to be the main way the virus spreads.

How easily the virus spreads
How easily a virus spreads from person-to-person can vary. Some viruses are highly contagious (spread easily), like measles, while other viruses do not spread as easily. Another factor is whether the spread is sustained, spreading continually without stopping.

Respirators
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Should I wear a respirator in public?
CDC does not recommend the routine use of respirators outside of workplace settings (in the community). Most often, spread of respiratory viruses from person-to-person happens among close contacts (within 6 feet). CDC recommends everyday preventive actions to prevent the spread of respiratory viruses, such as avoiding people who are sick, avoiding touching your eyes or nose, and covering your cough or sneeze with a tissue. People who are sick should stay home and not go into crowded public places or visit people in hospitals. Workers who are sick should follow CDC guidelines and stay home when they are sick.
What is a respirator?
A respirator is a personal protective device that is worn on the face or head and covers at least the nose and mouth. A respirator is used to reduce the wearer’s risk of inhaling hazardous airborne particles (including infectious agents), gases or vapors. Respirators, including those intended for use in healthcare settings, are certified by the CDC/NIOSH.
What is an N95 filtering facepiece respirator (FFR)?
An N95 FFR is a type of respirator which removes particles from the air that are breathed through it. These respirators filter out at least 95% of very small (0.3 micron) particles. N95 FFRs are capable of filtering out all types of particles, including bacteria and viruses.

Checklist to Get Ready
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As a family, you can plan and make decisions now that will protect you and your family during a COVID-19 outbreak.

Stay informed and in touch
Get up-to-date information about local COVID-19 activity from public health officials
Ask your neighbors what their plan includes.
Create a list of local organizations you and your household can contact in case you need access to information, healthcare services, support, and resources.
Create an emergency contact list including family, friends, neighbors, carpool drivers, healthcare providers, teachers, employers, the local public health department, and other community resources.
Prepare for possible illness
Consider members of the household that may be at greater risk such as older adults and people with severe chronic illnesses.
Choose a room in your house that can be used to separate sick household members from others.
Take everyday preventive steps
Wash your hands frequently
Avoid touching your eyes, nose, and mouth.
Stay home when you are sick.
Cover your cough or sneeze with a tissue, then throw the tissue in the trash.
Clean and disinfect frequently touched objects and surfaces Be prepared if your child’s school or childcare facility is temporarily dismissed or for potential changes at your workplace.

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Five things to know about COVID-19 transmission

People can catch COVID-19 from others who have the virus. The disease spreads primarily from person to person through small droplets from the nose or mouth, which are expelled when a person with COVID-19 coughs, sneezes, or speaks. These droplets are relatively heavy, do not travel far and quickly sink to the ground. People can catch COVID-19 if they breathe in these droplets from a person infected with the virus. This is why it is important to stay at least 1 meter) away from others. These droplets can land on objects and surfaces around the person such as tables, doorknobs and handrails. People can become infected by touching these objects or surfaces, then touching their eyes, nose or mouth. This is why it is important to wash your hands regularly with soap and water or clean with alcohol-based hand rub.

WHO is assessing ongoing research on the ways that COVID-19 is spread and will continue to share updated findings.

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Is Coronavirus COVID-19 Airborne?

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Whistleblowers silenced by China could have stopped global coronavirus spread | 60 Minutes Australia

Subscribe here: Full Episodes here | Coronavirus crisis: Together, apart (2020)

Mid-November in Wuhan, China, and cases of a strange new flu start surfacing. In a sprawling city of 11 million people, the coronavirus, our invisible brutal enemy was born - festering at least a month and a half before the world was told. In January President Xi Jinping made a decision that would ultimately condemn the world: allowing 5 million people to leave the epicentre of the virus without being screened.

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Is the Coronavirus ‘Airborne’ or Not?

Some scientists are becoming increasingly concerned that COVID-19 travels as an airborne pathogen. Let's break down what that means.
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The early days of the coronavirus pandemic were a confusing time. There was a lot of conflicting information flying around and it was hard to know what to believe about how the virus behaved and the best practices to stay safe.

Many of the precautions put forth by public health organizations are based on the belief that COVID-19 isn't airborne—wash your hands, avoid crowded indoor spaces, wear a mask, and practice social distancing—but some researchers are now challenging this notion.

So, what is at the heart of this debate, and how does it affect you?

Right now, it is widely accepted that the novel coronavirus is carried by the droplets that we expel when we talk or cough. These droplets do travel through the air, but aren’t considered “airborne” because they typically fall out of the air immediately and land within about two meters. Hence the recommended 6-feet social distancing guidelines.

But smaller than droplets are aerosols — tiny particles that, as a rule of thumb, are under 5 microns in size.

If the virus was really just carried by droplets, there are some instances of infection that some scientists say shouldn’t have been possible.

Find out more in the Elements.

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It Is Time to Address Airborne Transmission of Coronavirus Disease 2019 (COVID-19)
There is significant potential for inhalation exposure to viruses in microscopic respiratory droplets (microdroplets) at short to medium distances (up to several meters, or room scale), and we are advocating for the use of preventive measures to mitigate this route of airborne transmission.

Scientists say the coronavirus is airborne. Here’s what that means.

Though infection prevention experts know there’s a fuzzy boundary between drops that fall and specks that float, the dichotomy between airborne and droplet-borne is baked into how health care workers are trained to respond to outbreaks.

What 'airborne coronavirus' means, and how to protect yourself

In all of these case studies, aerosol transport did not happen over long distances, which bucks one of the classic conditions for airborne transmission.

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Coronavirus in Tamil | Dr. V Ramasubramanian | Apollo Hospitals

Know more about Coronavirus in Tamil by Dr. V Ramasubramanian from Apollo Hospitals, Chennai. Dr. V Ramasubramanian is a senior consultant in the Department of infectious disease and tropical medicine.

ಕೊರೋನಾ vs ಕರ್ನಾಟಕ | CORONAVIRUS (COVID-19) | Kannada

Do not Panic but Do not take it Lightly

Dr Prafulla Thumati , explains the basic steps we must take in order to prevent the spread of the CORONAVIRUS (COVID-19 ) in Kannada
Help us to spread the message to all the citizens of the country.

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How Dogs Spread The Coronavirus

Let's answer the big questions about dogs and COVID-19. Can dogs be sick with it? Can they get us sick? Here are those answers from what we know now as well as 10 simple tips to keep your pup as healthy as possible during the quarantine. Note- I am NOT a vet but I do own several pups and have done research in this area to advise my patients in their homes.

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Coronavirus transmission and spread: The facts

While the risk of a coronavirus outbreak here in Canada remains low, health officials do expect more cases to come.
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The TRUTH Of How Coronavirus Spreads | Airborne COVID-19 Transmission

The TRUTH of How Coronavirus Spreads | Airborne COVID-19 Transmission

In this video we are going discuss about the airborne transmission of COVID-19 that is COVID-19 really in the air? What are the high risk places that we need to avoid if corona is really a airborne, what kind of mask, respirators do we need. What is the meaning of airborne transmission of COVID-19? What is the difference between a droplet and air borne transmission. The question about Why World health organization (WHO) officials are reviewing new evidence of airborne Covid-19 transmission and Can COVID-19 really last on surfaces formites and in the air? Is COVID-19 really a airborne disease? Will we all need to wear N-95 face-masks against SARS-CoV-2, these are the questions that we are going to discuss in this video.

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Is COVID Spread by Droplets or Is it Airborne?

Epidemiologists like Dr. Monica Gandhi maintain that the virus is spread through coughs and sneezes, while scientists maintain coronavirus is airborne and spreads through aerosols that travel like plumes of smoke. Environmental scientist Dr. Shelly Miller and Dr. Gandhi discuss the difference between the two and what we know about how COVID is actually spread.

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Scientists say coronavirus can be spread farther than 6 feet in tiny airborne particles

More than 200 scientists are asking the World Health Organization to update its guidance on how the coronavirus spreads in the air. They say fine particles may travel farther than six feet and fear current advice may not promote multiple layers of protection. Dr. Jon LaPook reports.

Scientists suggest coronavirus is airborne, ask WHO to change recommendations

The World Health Organization has said the coronavirus spreads primarily from person to person through small droplets expelled when a person with COVID-19 coughs, sneezes or speaks. Now, hundreds of scientists are saying there is evidence that the virus is airborne and are calling for the WHO to revise its recommendations.
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WHO Says Asymptomatic Spread Of Coronavirus Is Rare, Contradicting CDC | TODAY

The World Health Organization has said it is rare for asymptomatic people to spread the coronavirus, a message that contradicts current guidance from the CDC. NBC national correspondent Miguel Almaguer reports for TODAY.
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WHO Says Asymptomatic Spread Of Coronavirus Is Rare, Contradicting CDC | TODAY

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