There's a lot of choice about what type toe wear.

穿什麼類型的腳趾頭有很多選擇。

And in some countries the advice is changing as we learn more about how the virus spreads.

而在一些國家，隨著我們對病毒傳播方式的瞭解越來越多，建議也在改變。

So what are the options?

那麼有哪些選擇呢？

Well, ah, home made face covering is the simplest and cheapest, and it was promoted in 2020 because of worries about shortages of professional masks that medics desperately needed.

嗯，啊，家庭製作的面罩是最簡單最便宜的，因為擔心專業口罩短缺，醫護人員急需，所以在2020年推廣。

This one.

這個。

It's made from an old T shirt.

這是用一件舊T恤做的。

It's got three layers.

它有三層。

So should do a reasonable job of stopping any virus that I might release.

所以應該合理的阻止我可能釋放的病毒。

Which really matters because upto one in three people may be infected without even realizing and to make it more effective.

這真的很重要，因為每三個人中就有一個人可能在不知不覺中被感染，為了使其更有效。

There's the idea of doubling up having to coverings one on top of the other because that gives you more layers to stop the virus getting through.

有加倍的想法必須覆蓋一個在另一個上面，因為這給你更多的層次，以阻止病毒通過。

We saw a lot of these double masks on Inauguration Day in Washington.

在華盛頓的就職典禮上，我們看到了很多這樣的雙重面具。

They're not recommended by the US government or by the World Health Organization, but they are catching on.

它們不是美國政府或世界衛生組織推薦的，但它們正在流行。

Next up in quality is the surgical mask, thes air water resistant.

接下來的品質是手術面具，空氣防水。

So if someone coughs right at you.

所以如果有人對著你咳嗽。

The virus should be blocked.

應阻斷病毒。

They should provide you with some good protection on others around you, but they don't fit very well.

它們應該能給你對周圍其他人提供一些很好的保護，但它們並不是很合適。

There are gaps at the sides that tiny virus particles called aerosols could get through.

側面有縫隙，被稱為氣溶膠的微小病毒顆粒可以通過。

You can see how that happens in these lab tests.

你可以在這些實驗室測試中看到如何發生。

They show how air Andi aerosols can escape from around the masks.

他們展示了空氣安迪氣溶膠如何從面罩周圍逸出。

So to guard against that, there are better grades of mask.

所以為了防範於未然，有更好的面膜等級。

They're called N 95 in the US or F F P two or F F P three in the UK They've got filters inside them to screen out those aerosols in Austria there now required on Busses and in other public areas, while in Germany, elderly people have been given them for going shopping.

他們在美國叫N 95，在英國叫F F P two或F F P three，他們裡面有過濾器，可以屏蔽掉那些氣溶膠，在奧地利，現在巴士和其他公共區域都需要，而在德國，老年人去購物時也會得到它們。

Thes have a much closer fit, no gaps, which means you should be safer.

這款產品更加貼合，沒有縫隙，這意味著你應該更安全。

But they are a lot more expensive.

但它們的價格要貴很多。

While home made coverings air basically free, surgical masks cost about 10 pence each, while the FFB, to cost about £3 on their own masks, are not going to defeat the pandemic.

雖然家庭製作的遮蓋物空氣基本免費，但手術口罩的成本約為每隻10便士，而FFB，要在自己的口罩上花費約3英鎊，是不會戰勝流行病的。

No one is claiming that, but research shows they can make a difference.

沒有人宣稱這一點，但研究表明，他們可以有所作為。

Look how far a cough goes when there's no face covering to stop it, so anything that helps is worth pursuing.

你看，當沒有捂臉止咳的時候，咳嗽會走多遠，所以任何有用的東西都值得追求。

But they've got to be worn and removed really carefully, and they're bound to be with us for some time to come.

但它們必須非常小心地穿脫，它們一定會在未來的一段時間內陪伴我們。