There is no doubt that there are different knowledge systems in the world and different knowledge systems have been dominant in different times and places. Currently, western education is the dominant and the most sought after system of knowledge. There several debates on whether knowledge has a cultural stamp or depends on the context from which it originated from, or whether it's universal and value free. The best stance to this argument is to strike a midway between the diverging debates. Knowledge is universal, no nation, race, group, tribe can claim the monopoly of knowledge but there is stamp which indicates the origin of the knowledge system.
In the science of disease for example, western medicine looks at the mind and body as being dualistic rather being holistic. They separate this two matters and even consider the ailments rather than patient. In true facts, the curing and treatment of an ailment depends largely on the patient, this is so because in diagnosis patient usually give description of their physiological states and wrong description of these processes may give the physician a wrong overview of the actual situation. This go a long way in affecting the prescription of the physician.
Being healthy does not involve the physical well-being alone but encompasses the psychological well being of the individual which is usually neglected in many cases. Diseases could be of infection, mind, heart, spiritual and psychological. When you have an infection go see a doctor, but the diseases that affects other domains like the mind, spiritual and psychological domains, meet the local and indigenous people. This is because they have a revolutionary way of tackling diseases which is very holistic in nature and does not separate mind from the body and ailments from the patient. Their approach is dialetical in nature and they are the most valuable and critically endangered species on earth that must be preserved. They are the ones who have answers to our unasked questions about the nature.