Q & A: Heading Off a Cold

Can you fight off a cold?

Zrodlo (oryginalny wpis) na http://www.nytimes.com/2008/04/08/science/08qna.html?ex=1365307200&en=19c3897b2a99e55b&ei=5088&partner=rssnyt&emc=rss,By C. CLAIBORNE RAY