Does Taichi cure ?

Yes and No.
My father in law, a medical doctor, is 71, he has a lot of problems, wrong blood pressure, gland organ problem... but he think that he could only be cured by future medical science, sad isn't it? I am not saying that Taichi is able to cure everything. But at least it helps, and many including myself were cured from nightmares.
Once one is ill, he should go to doctors. He should take medicine or be operated. But be aware that most medicines have side-effects and may not cure even simplest illness. Taichi helps to promote one's general health condition. Some illness might leave you after you practice Taichi. Like medicine, Taichi is not 100% working. Unlike medicine, Taichi has no side-effect.