The health of populations depends on many alternative factors. Epidemiology is a discipline that features a crucial role in describing health standing, characteristic risk factors, and analyzing relationships between health and totally different risky agents. Epidemiology not only measures the relationships between hosts and agents in bound settings however conjointly the health standing of the population living therein environment analyses. However, to boost the health status of the population, the information made by epidemiology has to be used and translated into interventions. Epidemiology features a long tradition and has created a wealth of accumulated expertise to assess micro-environments and specific agents that will impact health.