The examination of sickness transmission is the assessment and evaluation of the course, models and determinants of thriving and infirmity conditions in depicted people groups. It is a foundation of general success, and shapes approach choices and proof based practice by seeing danger factors for malady and communities for preventive social assurance. The examination of disease transmission is the assessment of sicknesses in masses of people or different creatures, unequivocally how, when and where they happen. Disease transmission specialists attempt to comprehend what parts are associated with illnesses chance elements, and what segments may ensure individuals or creatures against sickness defensive segments.