Epidemiologists are public health professionals who collect and analyze data to address local and global health issues. Key individuals and historical events have helped shape the field of epidemiology. Research the following individuals and their roles in shaping contemporary epidemiology:John GrauntJames LindEdward JennerIgnaz SemmelweisJohn SnowExamine the history, principles, and application of epidemiology and write a 1,000-1,250 paper to explain your findings. Choose one of the individuals from your research and include the following:Define epidemiology and discuss its purpose and importance to public health.Describe the disease and the event. Using descriptive epidemiology, discuss how common the disease was at the time, who was infected, when it occurred (time of year or season), and the mode of transmission. If the individual is not associated with a specific disease, discuss a significant disease happening during that period.Explain how the individual influenced epidemiology and discuss the advanced epidemiological methods and process the individual used to describe and control disease. Discuss how the individual’s contributions helped to inform the application definition of epidemiology in public health.Identify and describe three subspecialties within epidemiology.You are required to cite to a minimum of three sources to complete this assignment. Sources must be published within the last 5 years and appropriate for the assignment criteria and public health content.APA format, no later than Tuesday night