What is a major problem for modern medicine ?
As such , chemistry and physics could become the basis for medicine , all the more in that medicine effectively had been reduced to surgery and chemistry , the latter due to Pasteur ’s ‘ germ theory ’ of disease ( really an unproven hypothesis and where proven according to strict requirements of Koch ’s postulates , still not fully explanatory in terms of the concepts and reality of ‘ susceptibility ’ and ‘ immunity ’ , which contemporaries of Pasteur , such as Béchamp and Claude Bernard , sought to address ) .