The Coronavirus Explained & What You Should Do

In December 2019 the Chinese authorities notified the world that a virus was spreading through their communities. In the following months, it spread to other countries, with cases doubling within days. This virus is the Severe Acute Respiratory Syndrome-Related Coronavirus 2 that causes the disease called Covid-19 and that everyone simply calls coronavirus. What actually happens when it infects a human and what should we all do? [Intro Music] A virus is really just a hull around genetic material and a few proteins, arguably not even a living thing. It can only make more of itself by entering a living cell. Corona may spread via surfaces, but it’s still uncertain how long it can survive on them. Its main way of spreading seems to be droplet infection when people cough, or if you touch someone who’s ill and then your face, say rubbing your eyes or nose. The virus starts its journey here, and then hitches a ride as a stowaway deeper into the body Its destinations are the intestines, the spleen or the lungs, where it can have the most dramatic effect. Even just a few corona viruses can cause quite a dramatic situation. The lungs are lined with billions of epithelial cells. These are the border cells of your body, lining your organs and mucosa waiting to be infected. Corona connects to a specific receptor on its victim’s membranes to inject its genetic material. The cell, ignorant of what’s happening, executes the new instructions, which are pretty simple: copy and reassemble. It fills up with more and more copies of the original virus until it reaches a critical point and receives one final order, self-destruct. The cell sort of melts away, releasing new corona particles ready to attack more cells. The number of infected cells grows exponentially After about 10 days, millions of body cells are infected, and billions of viruses swarmed the lungs. The virus has not caused too much damage yet, but corona is now going to release a real beast on you, your own immune system. The immune system, while there to protect you, can actually be pretty dangerous to yourself and needs tight regulation. And as immune cells pour into the lungs to fight the virus, Corona infects some of them and creates confusion. Cells have neither ears nor eyes. They communicate mostly via tiny information proteins called cytokines. Nearly every important immune reaction is controlled by them. Corona causes infected immune cells to overreact and yell bloody murder. In a sense, it puts the immune system into a fighting frenzy and sends way more soldiers than it should, wasting its resources and causing damage. Two kinds of cells in particular wreak havoc. First, neutrophils, which are great at killing stuff, including our cells. As they arrive in their thousands, they start pumping out enzymes that destroy as many friends as enemies. The other important type of cells that go into a frenzy are killer T-cells, which usually order infected cells to commit controlled suicide. Confused as they are, they start ordering healthy cells to kill themselves too. The more and more immune cells arrive, the more damage they do, and the more healthy lung tissue they kill. This might get so bad that it can cause permanent irreversible damage, that leads to lifelong disabilities. In most cases, the immune system slowly regains control. It kills the infected cells, intercepts the viruses trying to infect new ones and cleans up the battlefield. Recovery begins. The majority of people infected by Corona will get through it with relatively mild symptoms. But many cases become severe or even critical. We don’t know the percentage because not all cases have been identified, but it’s safe to say that there is a lot more than with the flu. In more severe cases, Millions of epithelial cells have died and with them, the lungs’ protective lining is gone. That means that the alveoli – tiny air sacs via which breathing occurs – can be infected by bacteria that aren’t usually a big problem. Patients get pneumonia. Respiration becomes hard or even fails, and patients need ventilators to survive. The immune system has fought at full capacity for weeks and made millions of antiviral weapons. And as thousands of bacteria rapidly multiply, it is overwhelmed. They enter the blood and overrun the body; if this happens, death is very likely. The Corona virus is often compared to the flu, but actually, it’s much more dangerous. While the exact death rate is hard to pin down during an ongoing pandemic, we know for sure that it’s much more contagious and spreads faster than the flu. There are two futures for a pandemic like Corona: fast and slow. Which future we will see depends on how we all react to it in the early days of the outbreak. A fast pandemic will be horrible and cost many lives; a slow pandemic will not be remembered by the history books. The worst case scenario for a fast pandemic begins with a very rapid rate of infection because there are no counter measures in place to slow it down. Why is this so bad? In a fast pandemic, many people get sick at the same time. If the numbers get too large, health care systems become unable to handle it. There aren’t enough resources, like medical staff or equipment like ventilators, left to help everybody. People will die untreated. And as more health care workers get sick themselves, the capacity of health care systems falls even further. If this becomes the case, then horrible decisions will have to be made about who gets to live and who doesn’t. The number of deaths rises significantly in such a scenario. To avoid this, the world – that means all of us – needs to do what it can to turn this into a slow pandemic. A pandemic is slowed down by the right responses. Especially in the early phase, so that everyone who gets sick can get treatment and there’s no crunch point with overwhelmed hospitals. Since we don’t have a vaccine for Corona, we have to socially engineer our behaviour, to act like a social vaccine. This simply means two things: 1. Not getting infected; and 2. Not infecting others. Although it sounds trivial, the very best thing you can do is to wash your hands. The soap is actually a powerful tool. The corona virus is encased in what is basically a layer of fat; soap breaks that fat apart and leaves it unable to infect you. It also makes your hands slippery, and with the mechanical motions of washing, viruses are ripped away. To do it properly, wash your hands as if you’ve just cut up some jalapeños and want to put in your contact lenses next. The next thing is social distancing, which is not a nice experience, but a nice thing to do. This means: no hugging, no handshakes. If you can stay at home, stay at home to protect those who need to be out for society to function: from doctors to cashiers, or police officers;. You depend on all of them; they all depend on you to not get sick. On a larger level, there are quarantines, which can mean different things, from travel restrictions or actual orders to stay at home. Quarantines are not great to experience and certainly not popular. But they buy us – and specially the researchers working on medication and vaccinations – crucial time So if you are put under quarantine, you should understand why, and respect it. None of this is fun. But looking at the big picture, it is a really small price to pay. The question of how pandemics end, depends on how they start; if they start fast with a steep slope, they end badly. If they start slow, with a not-so-steep slope, they end okay-ish. And, in this day and age, it really is in all of our hands. Literally, and figuratively. A huge thanks to the experts who helped us on short notice with this video, specially Our World In Data, the online publication for research and data on the world’s largest problems and how to make progress solving them. Check out their site. It also includes a constantly updated page on the Corona pandemic [Outro music]

100 thoughts on “The Coronavirus Explained & What You Should Do

  1. Phew. That might have been the fastest we ever made a video. Literally working day and night. A huge challenge in talking about Corona was that the science is ongoing. So we put in extra special care to have good sources for this video and will update them in the coming weeks and months. Check them out here:

    We could not have made this video without experts who took time in one of the busiest periods of their own careers. A huge thanks especially to Dr James Gurney and Dr Max Roser of Our World in Data for helping us make sure the video was as accurate as it could be in a situation that is changing daily.

    Also a big shoutout to – the online publication for research and data on the world’s largest problems – and how to make progress solving them. Check out their site. It also includes a constantly updated page on the Corona Pandemic. Working together with them over the years has been a delight.

    Ok. We are very tired and are going to take a nap now. Stay healthy!

  2. If you really want to help, please make the video Public, what I mean is, Make it available on all platforms – Instagram, FB, etc. So that we can directly share it from there. Most ppl don't open links to reach here on YT and view the video.
    I wanted to share this video on Instagram but there was no way.

  3. Even slow pandemic will be remembered by history books so that in future we are more prepared to fight against these biological demons

  4. Evangelical leaders – "don't worry about the virus, christ will save you" "keep coming to church, give your friends a hug and tell them jusus loves them"…. Organized religion is currently damaging the United States more than the idiots on spring break.

  5. This time in the Philippines, is state of calamity, and no trasportation and close all Mall and establishment is close, and results is no work, this is the firts time in history, because and reasons is Ncov19, made in china, chinese people eat everything, like dog, rats, snack, fetus and etc, Chinese is retarded. And all Filipino is sacrifice in this day.

  6. i haven't left the house in 3 weeks honestly other then doing my self a favor i think just being home you're helping so many others and aswell as your self. if you can stay home. STAY HOME

  7. As a medical student – Marvelous explanation ! Just to add- we don't know exact critical cases because of weak identification (as mentioned) AND also because we do not know how many ot the currently mild cases will progress to critical ones.(which a significant number will do)

  8. This is a modified AIDS virus…. you fucks still believe that it came from "bats and snakes" this was made in a fucking lab. WAKE THE FUCK UP

  9. Thank you 🙏🏼 I’ve always appreciated your content. Everyone please do your part we don’t want to see patients laying around the hospital’s corridors and not be able to help them. We will get through this together 👍🏼

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  11. Hoi ik moet kennis maken ik ben
    Chaymae_breda ik ben een vloger hoe moet ik een vloger worden
    Wie kan ne helpen aboneer hier op mijn kanaal en doe een blauwe duimpje omhoog en niet omlaag

  12. The Abe administration in Japan is letting it go without testing the virus.

    They don't do tests, and they don't increase the number of burn victims. He's swindling his country out of it in the safest way.

    I feel sorry for the Japanese people.

    Perhaps at a time when countries around the world are liberated from the coronavirus, it will spread from Japan back to the world.

  13. I live in India and I'm currently under self quarantine. I would like to thank our people who are staying at home and helping to flatten the curve.

  14. China Is Fast Pandemic
    World Is Slow Pandemic In January.
    Medium Pandemic In March To June
    High Pandemic In September to October

  15. Be safe everyone from coronavirus. Down below there are steps to keep protected from coronavirus.
    Wash your hands with soap and water often– do this for at least 20 seconds. (sing happy birthday two times or more)
    Always wash your hands when you get home or into school.
    Use hand sanitiser gel if soap and water are not available.
    Cover your mouth and nose with a tissue or your sleeve (not your hands) when you cough or sneeze.
    Put used tissues in the bin immediately and wash your hands afterwards.
    Avoid close contact with people who have symptoms of coronavirus.
    Only travel on public transport if you need to.
    Avoid social activities, such as going to pubs, restaurants, theatres and cinemas.
    Avoid events with large groups of people.

  16. Cometh the hour. Cometh the Kurzgesagt.

    Steve Taylor's wonderful voice should be used to speak the truth to the masses. His style is perfect at this time. Cheers Steve.

  17. The Coronavirus is no different than the West Nile virus, the Common Cold virus, or the Cancer virus, or the Influenza virus, or the Rabies virus, or the HIV virus, the Chickenpox, mumps, measles, whooping cough, shingles, viruses etc, etc,etc. and its been around forever just like all the other viruses have been..I really don't know what the issue is with this one, and why The Fake News Media have created such panic, and such drama over it by turning people into hypochondriacs!…People need to wake up, and stop acting so paranoid…It's a virus just like the rest of them I've mentioned are!..Simple As That!..Since the beginning of time, and long before the light microscope, and the electron microscope were invented people have been exposed to viruses, and viral diseases!…That's part of life!..There's no such thing as a "new virus"..Viruses have been around for billions of years just like bacteria, and other microscopic life forms have been!

  18. I was waiting very long for this channel to cover this topic! Amongst so much fake news online it sometimes gets very hard to verify what is true and what is not, and in the midst of this madness, there being a source of information which we can actually trust really helps out! Keep up the wonderful work Kurzgesagt!

  19. This is the best video for people with little technical knowledge. It's simple, yet very informative.
    Thanks for making this.
    Do you have any plan to make a Bangla version ?
    If not, will you allow to make a Bangla version ? Of-course with full credit.

  20. Can you give us more information about ‘nano ships’? I just heard about it in the Cosmos documentary on National Geographic, it sounds like a really interesting subject and as my knowledge about nanotechnology and related technologies is very slim, I would really like to learn more about it…

    Thanks in advance.

  21. This 8 minute video explains it better than all the media articles and video's i've read and seen about the virus tbh

  22. Great video as always, sad that you didnt cover the potential longterm economic damages of drastic measures such as quarantine etc tho, would be interesting as well

  23. 精度の高い字幕のおかげで、英語を解しない私でも内容を理解出来ました。


  24. Can you imagine us without internet?!! Most of the people probably would be dead by now, that's what happened with the Indians with the measles and the flu. So sad =

  25. I dont know how but you have got my 10,11,12 year old attention. Youre videos are something that I will never forget.Also how!how did you gt my attention for years?


  27. can you guys at least give a warning before you reveal such horror….jesus man this channel is the most intense content i ever seen lol
    science is scary lol

  28. WASH YOUR HANDS!!! ♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀

  29. WASH YOUR HANDS!!! ♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀

  30. WASH YOUR HANDS!!! ♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀

  31. WASH YOUR HANDS!!! ♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀

  32. WASH YOUR HANDS!!! ♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀

  33. WASH YOUR HANDS!!! ♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀

  34. WASH YOUR HANDS!!! ♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀♂♀

  35. I hope that people actually wake up and start treating this pandemic like how it should be, instead of taking risks.

  36. wait if ur infected by bacteria after you've been infected by coronavirus cant u go to a hospital and the get injected with bacteriophages to kill the bacteria quickly

  37. This is an excellent video for those who say “We should wait for covid19 to kill as many as the flu before enacting drastic measures.” You will be forced to take those measures down the road and under much dire circumstances. The sooner those measures are taken, the better is the chance to beat the virus and quickly recover from it. Let’s share widely.

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