Erik, Thanks for the positive feedback. The question you’re asking is simple, but the answer is very complex. What I can offer here are a few basic guidelines. To begin, qi gong strengthens the immune system. The stronger the immune system, the less chance you have of contracting illnesses, such as colds and flus. However, Dragon Tiger is designed to strengthen and clear the wei qi and the etheric field, which is your first line of defence against such illnesses. The stronger your qi, the less chance you will become ill. Therefore, it is better to get your practices up and prevent illness from arriving rather than once it’s set it. if you feel something coming on, then that’s the time to increase your practice, so you can get it out of your system. The downside is, if your practice is weak, half-hearted or feeble, you can actually invigorate the invader. If the illness has really taken hold, then rest is best. When you feel it diminishing and your strength returning, you can resume your practice to help kick it out!