is the study of the frequency, distribution, and causes of infectious and non-infectious disease in a population, based on an investigation of the physical and social environment.

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Epidemiology is the study of the frequency, distribution, and causes of infectious and non-infectious disease in a population, based on an investigation of the physical and social environment. Etiology is the study of the causes of diseases. Morbidity refers to the incidence or prevalence of disease within a population. Immunology is the study of the immune system and its responses to pathogens. Health psychology is the study of how psychological factors influence health and illness.

Is the Study of the Frequency, Distribution, and Causes of Infectious