Gargling salt water, popping vitamin C and more: do these really prevent a cold?

A balanced diet should mean you needn't take supplements though extra vitamin C can help reduce a cold's duration, say scientists. — Klaus-Dietmar Gabbert/dpa

Colds may be spreading where you are, matched by plenty of tips about ways to stay well.

Are they true, though? We asked scientists whether we should be boiling beer, gargling salt water and knocking back vitamin C.

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科学家表示，均衡的饮食通常意味着你无需服用补充剂，但额外补充维生素C有助于缩短感冒病程。——克劳斯-迪特马尔·加伯特/德新社

感冒可能正在你所在的地方传播，同时也有很多保持健康的建议。

这些说法是真的吗？我们询问了科学家们是否应该煮沸啤酒、用盐水漱口和服用维生素C。

医生警告：即使是健康人，长时间暴露在雾霾中也会受到伤害。

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