It seems it might be true:
www.newscientist.com/article.ns?id=dn1777
http://www.newscientist.com/article.ns?id=dn1777
I couldn’t get your link to work, but this one did.
Welcome to the SDMB, Johan.
A link to the Straight Dope column that you’re commenting on is appreciated. This is the one: Is it “feed a cold, starve a fever” or vice versa? And should you?