(EN) D.P. Agarwal, About The Date Of Caraka, The Famous Ancient Physician, su infinityfoundation.com. URL consultato il 14 giugno 2016 (archiviato dall'url originale il 1º luglio 2002).
«No doubt Caraka conceived the germ theory of the causation of diseases, but he rejected the idea that germs are the only causative factors for disease. On the other hand, he had advanced the theory that it is the imbalance of dosas and vitiation of dhatus which are primary causes of diseases, and various germs may grow in the body only when they get such a congenial environment. Both for metabolic diseases and infective ones, correction of the imbalance of dosas and dhatus constitutes the basic principle of all therapeutics. This is a unique feature of the Ayurvedic concept of diseases and their management as enunciated by Caraka in his monumental work.»
