I think it depends on how you feel. Typically it's okay to exercise as long as your symptoms are above the neck (not a chest cold, etc.). But you might find that you don't have much energy for exercise, or that you need to do light activity instead of your regular workout. Just listen to your body.
Feel better soon!
"You may have a fresh start any moment you choose, for this thing that we call "failure" is not the falling down but the staying down." Mary Pickford