Hahnemann's teachings on Psora – are they still valuable nowadays?

Hahnemann was facing a clinical problem, and he decided to solve it. There was a group of patients showing a different pattern of disease – which did not benefit, whatsoever from the homeopathic treatment.

This was our first question: are these observations still reliable nowadays?

He investigated this problem for eleven years, analyzing every single case, where common patterns were found, until he conceived a full image of the common features for this disease. What is this image? Can we find it in our patients?

He developed a different and exclusive materia medica for this group of patients. Why did he take all the effort to do it? What are the main differences between the two works? Do we know how to use them, being one different from the other?

He affirms that this special group should receive a differentiated homeopathic treatment, including a different follow up. What kind of treatment was it? Can we still use it today? Have we ever used it in our daily practice?

Last but not least, he affirmed, that there must be a trigger in the beginning which is the original cause of illness, and he named it Psora. Do we know what he really meant by this conclusion, what he meant by a dynamic contagious disease?

Hahnemann's train of thoughts of understanding, what are true Chronic Diseases still need to be studied, comprehended and employed to help the sick. Based on a full knowledge of his teachings we shall be able to diagnose and help these patients.