Scientists say cold noses reduce ability to fight virus attacks

Interesting, but short of a balaclava, how do I keep their noses warm?

http://www.cnn.com/2005/HEALTH/11/14/cold.chill/index.html

"If they become chilled, this causes a pronounced constriction of the blood vessels in the nose and shuts off the warm blood that supplies the white cells that fight infection. The reduced defences in the nose allow the virus to get stronger and common cold symptoms develop."

Edited to add: I guess a balaclava really wouldn't cut it, since it doesn't cover the nose, as I thought. "Ski mask" probably would have been better, but I don't think they would wear that, either, so I'm back where I started.