Epidemiology is the study of investigation and examination of the dispersion, examples and determinants of wellbeing and ailment conditions in characterized populations.It is a foundation of general wellbeing, and shapes strategy choices and proof based practice by recognizing hazard factors for illness and focuses for preventive social insurance. Disease transmission experts help with study structure, assortment, and factual examination of information, alter translation and scattering of results . The study of disease transmission has created system utilized in clinical exploration, general wellbeing contemplates, and, less significantly, fundamental examination in the organic sciences. Significant zones of epidemiological examination incorporate ailment causation, transmission, episode examination, infection reconnaissance, natural the study of disease transmission, measurable the study of disease transmission, word related the study of disease transmission, screening, biomonitoring, and correlations of treatment impacts, for example, in clinical preliminaries. Disease transmission specialists depend on other logical orders like science to all the more likely comprehend illness forms, measurements to utilize the information and make suitable inferences, sociologies to more readily comprehend proximate and distal causes, and designing for introduction assessment.Epidemiology, truly signifying "the investigation of what is upon the individuals", is gotten from Greek epi, signifying 'upon, among', demos, signifying 'individuals, locale', and logos, signifying 'study, word, talk', recommending that it applies just to human populaces. Be that as it may, the term is broadly utilized in investigations of zoological populaces , in spite of the fact that the expression "epizoology" is accessible, and it has likewise been applied to investigations of plant populaces (organic or plant ailment epidemiology).