為什麼流行感冒主要發生在冬季？
Why does the infection spread primarily in the winter months?
~The answer is on next page.
Because,
researchers say, the virus stays longer in cold and dry air.
http://www.iht.com/articles/2007/12/05/america/flu.php
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12/09 23:22, , 1F
12/09 23:22, 1F