People have found a way to protect themselves by wearing face masks.

人们发现可以通过戴口罩的方法来保护自己。

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In a study, scientists from the US and Denmark said that people around the world are now using 129 billion face masks every month.

在一项研究中，来自美国和丹麦的科学家表示，世界各地的人们现在每月使用1290亿个口罩。

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Many of them wore face masks and overcoats.

他们中的很多人头戴面具，身披外套。

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Although face masks, which have become a common sight in Mexico City, are worn by only a few people on the streets of Juarez,pharmacies say they are doing a brisk business selling them.

VOA: standard.2009.04.30

People wearing face masks are now a common sight on the streets of some Asian cities.

ECONOMIST: Still spreading | The

Airlines have been advised to stock the planes with gloves and face masks in case of an emergency.

CNN: Travelers returning from Mexico should be cautious

Two people were arrested for failing to remove face masks and two for assault, obstructing and resisting a police officer.

BBC: Eight arrests during Brighton protest