If you do not follow the principles of law and chariya. We can buy/sell stem cell and can lead to other diseases that still can't maintain those diseases, because it requires stem cell.
If not, follow the ethics and law. We can trade stem cell and can be used to treat other diseases that can not be treated because of the need for stem cell.
If you don't follow the principles of ethics and the law, we can trade stem cell and can be used to treat other still incurable because such diseases need to use. Stem cell.