Can you really smell a cold coming? Seen this post from Zazen...

[becklespeckle]

I was reading the Kleenex tips and saw this one from Zazen

...And if you smell nitrous oxide on anyone's breath, hold you own breath and turn away to breathe - their nose is making this gas to kill bugs they already have and they are infectious. Nitrous oxide smells 'cold' and metallic...

I always swear I can smell when my DCs and DH are getting a cold and am usually right, the smell is just as Zazen describes.

DH and my friends think I am mad - does anyone know the science behind this so I can be all knowing when I tell DH I am right?

I have just been told by my gp that "i smell of a cold, have I got one?" no I havent. been given anti booties as I probably have a sinus problem.

anti booties? really?