Q.1 What is the difference between epidemiology of 19th century and 21st century?
Ans: During the 19th century, epidemiology only focused specifically on acute infectious diseases, whereas in the 20th century the focus is divided onto Infectious diseases, Deficiency diseases, Chronic diseases, Psychiatric disorder and how injury, drugs and individual approach towards the disease work collectively.
Q.2 What do you mean by epidemiology of behavior?
Epidemiology, with the aid of public health
have primarily studied personal behavior,such as-
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Health care-related (treatment seeking, compliance)
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Lifestyle behavior (smoking, use of alcohol, sloth, etc.)
The epidemiology of behavior framework is proposed to specify a systematic sequence of studies on health-related behaviors, leading to evidence-based interventions directed at populations.