CAUSE+kerry+liu+common+cold

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//__**Cause**__//



10 to 15 percent of adult colds are caused by viruses.



200 viruses are known to cause the common cold.

30 to 50 percent of adult cold causes remain unknown. No one knows what caused them.

There is know evidence that you can get a cold from exposure to the cold, getting too hot or cold although air that is dry may increase your chances of catching the common cold.

Question Check: Does exposer to cold weather increase your chances of causing the common cold?

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