Name: 每年製作流感疫苗 (Making Flu vaccine each year)
Uploaded: 2021-01-14T05:00:41.000Z
Duration: 9 min 17 s
Description: 【看影片學英語】數萬部 YouTube 影片，搭配英漢字典即點即查，輕鬆掌握單字發音與用法，長久累積看電影不必再看字幕。

So the story begins with the WHO, the World Health

情態副詞

And the WHO actually works with a few of the regional labs.

So there are actually five labs sprinkled around the world.

And these labs collect specimens from hundreds of countries.

do surveillance to figure out what type of flu

is affecting their particular population.

And then there's another one over here in Japan.

And a fourth one in the southern hemisphere in Australia.

And finally, there's one in the United Kingdom.

The WHO will take a look at all the different strains that

have come into these five labs again from all over the world.

Because flu usually moves around the world

as to what strains they should include in the vaccine

And sometimes they'll pick something brand new.

I'll start with the type of virus they put in there.

And generally it's two type A's and one type B.

The WHO recommends that for the trivalent, or three strain

They usually name it in part based on location.

And they'll say the location is-- in this case,

the first one actually came from California.

The second one came from Victoria, Australia.

And the final one came from Wisconsin in the United States.

So this is the location of the three strains.

So they'll give you a number and what that number refers to.

It doesn't mean a whole heck of a lot to us.

But we're going to put it in there just because that's

The strain number is, for the first one, 7.

And then finally, they'll put the year that they actually

And this first one, this type A, was actually

Whereas the other ones are a little bit newer,

So, that's what comes after the strain number.

only applies to the first two, is that if it's a type A,

they'll actually tell you the H and N type.

So, for example, the first one, the California strain,

And the third one, because it's a type B,

we don't really use that H and N classification.

So I'll just put a hash there, meaning nothing.

in some sort of formal document, at least now

you know what the heck all these numbers and words refer to.

So this is literally how they name the strains.

And just for you and I to know, this first one here,

So, this is actually part of the last few vaccines.

Whereas these other ones down here, these ones,

They were not part of the vaccine in previous years.

These are new additions or changes to the vaccine.

two type A's and one type B. And the type A's, one is a H1N1

That's how we've been doing it in recent years.

Now let me bring up a little bit more canvas

because I want to talk you through exactly what happens

And this decision was actually made back in February of 2012.

So months and months in advance they're figuring out what

And that information then goes to the next group

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每年製作流感疫苗 (Making Flu vaccine each year)

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world

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