It happens. How do you deal with it? Train through it or RnR until over?
It happens when he is the fittest.
It happens when trying to be team-like and hanging out with others.
Last year he rode/trained through his cold and it seemed to take 1+ months to get over it, but he trained during it.
This time, we shut him down - for a week and seems other than hacking and nose drips he's on the up side.