To exersize or not?

It's a pointlesss question to ask for the time when you feel fit and healthy but what about the times when you have headache and your nose runs?
Well I was thinking that all consequences from working out are always
positive but not long ago I read that in fact it can have bad effects
if you have a cold. On the website of SHAPE I found the following
advice, which I thought was worth sharing:

First, figure out your symptoms. In general, a sickness that causes above the neck symptoms — like a headache, congestion, or a runny nose — means you can exercise. Any flu-like symptoms like aches or pains, chest congestion, nausea, or a fever, means you should stay away from your fitness gear until you feel better.