At all times people were exposed to the болезням.И if they had the wound ,he treated her инстинктивно.Первое their action was suck or lick her. And so, with the instincts of man was treated for a long time But as the centuries passed ,people used to develop ,learned новое.Первыми civilized people ancient Egyptians became .They have studied human тело.Потом Indians in Mexico,who used наркотики.Также science developed and in Peru,India and Китае.В China used acupuncture and found approximately two thousand medicinal substances.