Abstract

Background: As it is well known that a disease is any disorder or incorrectly functioning organ, part, structure or system of the body resulting from the effect of genetic or developmental errors, infection (caused by pathogenic microorganisms), poisons, nutritional imbalance or deficiency, toxicity or unfavorable environmental factors [1,2]. Fortunately, during twentieth century, medical investigation and research have been diagnosed, treated, cured and prevented many diseases. The primary treatment is through using vaccines and drugs, which are required and beneficial. Medical research is a vital to the health and wealth of societies, as scientific knowledge can improve health and the quality of life. The objectives of this article are to discuss many topics (immunity, immunogenetics, molecular genetics, pharmaceutical, histopathology and other relevant subjects), to get what has medical research done to improve health of human, to figure out whether these research are at the right track? and to suggest recommendations for future medical research.