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  • Hey guys I'm Cleo. I'm a producer here at Vox and I'm also the host of Vox's

  • first-ever daily show. It's called Answered, it's on a new

  • streaming app called Quibi and every day we take on a question about this

  • confusing moment that we're living through. So now I get to share with you

  • guys one of my favorite episodes so far. Here we go.

  • By now you've probably heard of Nadia the tiger but if not allow me to

  • introduce you.

  • A tiger at a zoo in New York has tested positive for coronavirus

  • Researchers think that she caught it from a human zookeeper.

  • At the zoo four

  • year old Nadia her sister Azul, two amur Tigers and three lions all developed dry

  • coughs.

  • Don't worry. Nadia's doing a lot better now but her illness highlighted

  • something about the virus itself it's zoonotic. That means it can transmit

  • between humans and animals.

  • Now the bond between a Pomeranian and its owner may

  • have taken a serious turn.

  • The study showed Winston the family's fun-loving

  • pug contracted COVID-19.

  • According to the CDC and the US Department of Agriculture

  • two cats in separate parts of New York tested positive.

  • All of this has me wondering.

  • Which animals can catch coronavirus? Should I be worried about my

  • pet? I'm Cleo Abram and this is answered by Vox.

  • Well for most animals that we've

  • seen that can be infected by COVID-19, they don't have very serious symptoms .

  • That's Dr. William Karesh. He's a wildlife veterinarian and an

  • expert on animals and pandemics.

  • I have a dog. Should I be worried about my dog?

  • No. You should not be worried about your dog.

  • Dogs have been shown in rare cases to

  • pick up the virus but the virus doesn't grow very well in dogs.

  • People found out

  • that dogs have it just out of curiosity because the people in the homes were

  • very sick and they thought well let's just test the dogs and see if they might

  • have it. And they picked up the virus but the dogs weren't sick.

  • Cats seem to be more susceptible and cats can actually infect other cats

  • but they don't get very sick.

  • While it is possible for our pets to get very mild cases of COVID-19

  • the CDC says "The risk of animals spreading COVID-19 to people

  • is considered to be low."

  • So it seems like we can take our pets getting sick or

  • getting us sick off our list of worries.

  • But it's clear that COVID-19 can

  • transmit between humans and animals so researchers are trying to figure out

  • which animals are most susceptible.

  • Once the virus breaks into an animal's body

  • it needs to fit itself inside a special receptor on the target cell called ACE2

  • the virus and receptor act kind of like a lock and key.

  • The more easily the SARS-CoV2 virus latches on to a species ACE2 receptor,

  • the more likely that animal is to become infected.

  • Each species' ACE2 receptor is a little bit different,

  • so not all animals get infected equally.

  • The virus is more likely to bind in humans, camels, cats, pangolins and bats

  • but less likely in rats, mice, chickens and guinea pigs.

  • So this is the first part of the story

  • which which animals can it bind to, but it's not the whole story because we know

  • that pigs actually don't have a productive infection even though they

  • can receive the virus.

  • Which is why so many animals are susceptible to the

  • virus, but it doesn't make them sick.

  • We don't want to jump to too many

  • conclusions but it's a beautiful start to a way to look at susceptibility.

  • The ACE2 receptor is really only an indicator of whether or not an animal

  • can become infected with coronavirus. It doesn't tell us anything about how

  • coronavirus can spread between humans and animals.

  • I've heard people talk about bats, about pangolins,

  • about wet markets,

  • So I'm wondering what do we know for sure

  • about how COVID-19 got from animals to humans?

  • Well right now we don't know what the original animal source was.

  • We know that there's many viruses

  • very similar to COVID-19 like all it's kissing cousins and his brothers and

  • sisters.We find those in bats.

  • Many of the viruses that make us sick originally

  • came from the animal kingdom. The common cold originated in camels.

  • Many strains of flu come from pigs and birds.

  • HIV transferred to humans from a chimpanzee.

  • Ebola, SARS, Marburg, Nipah, and COVID-19 have all been linked to bats.

  • Is there a specific reason why these diseases come from bats as opposed

  • to other animals?

  • There's over 1,400 types of bats so

  • there are a lot of viruses for one thing. And then another is genetically,

  • we're not so distantly related to bats.

  • They're closer on the evolutionary tree,

  • they're closer to people than a lot of other animals are.

  • So the viruses of course then, it's easier to share viruses with things you're related to like

  • humans and gorillas can share a lot more viruses than anybody else.

  • Why is it though that when a virus like SARS-CoV2 jumps from animals to people it's so

  • deadly to us whereas it's less so to the original host animal?

  • All of us have viruses and bacteria living on us and we have grown used to them and over the

  • millennia we've actually evolved to use them when we spread them among species

  • they have very different reactions.

  • Over the last hundred years, the number of zoonotic diseases in people has been increasing.

  • On average a new infectious

  • disease emerges in humans every four months and 75% of them come from animals.

  • Zoonotic diseases have been around as long as there have been people and

  • animals together. What's new is what we call these new emerging infectious

  • diseases and that's a new virus like COVID-19. Those are becoming more and

  • more common. We have more exposure to wildlife as we encroach into wild areas

  • as we disturb habitats. They spread faster because of air travel and trade

  • so we live in a new world.

  • For now, we don't need to worry too much about the

  • animals in our lives getting sick from COVID-19.

  • But we should be worried about health and our relationship with the environment.

  • We need to detect these

  • things right away; not wait until they turn into a pandemic

  • And that's our show! Thanks for watching.

  • Every episode is kind of like that, it's five to six minutes long,

  • it takes on a question that's kind of in the

  • atmosphere right now and asks an expert for the answers that might make living

  • through this moment just a little bit easier.

  • So if you want to check it out

  • you can go to the link either up there or in the description down there,

  • Or you can go in your phone and download Quibi and search for 'Vox' or 'Answered'

  • I'll be there every day.

Hey guys I'm Cleo. I'm a producer here at Vox and I'm also the host of Vox's

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為什麼老虎會感染冠狀病毒,但你的狗會沒事? (Why tigers get coronavirus but your dog will be fine)

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    林宜悉 發佈於 2021 年 01 月 14 日
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