Qigong practice can strenghten human's immune system in a very special way. We all know in the rice field there is always weeds growing in company with rice shoots. So, people will use something to kill the weeds. Yes, sometimes weeds is killed, yet, in the meantime we also do something bad to the growth of the rice shoots. This state is similar with the treatment western doctor use towards patients who have such chronic disease.
Qigong treatment differs very much from western treatment.
It first will stenghten human's immune system, much like to let the rice shoots get stronger and stronger. When the rice shoots are strong enough the weeds will have less and less effect upon the shoots' growth. At the end the weeds will be dead due to the living environment changes. Qi can easily know which is good and which is bad for it is at the very base level of our existence and is the very root of our enery. Yet, few people knoe this.