Not right. cold and flu are both caused by virus.

The common cold and influenza are both upper respiratory infections caused by a virus. The difference between them is: Flu gives rise to a high fever; a cold may give rise to a mild fever. Flus usually start with a dry throat and nose; a cold usually starts with a runny nose.

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• 这么一说我也糊涂了，不过两者都和免疫力不够有关，免疫力够强就不容易感冒 -夏阳- ♀ (0 bytes) () 11/02/2017 postreply 08:36:59