Epidemiology of Infectious Diseases: It is the science that studies the patterns and distribution of infectious diseases, their effect on human populations, and its control in communities. This science identifies patterns of diseases such as bacterial, viral, fungal, or parasitic infections; the causes and effects of such diseases; follows the outbreak of diseases, determines risk factors, and assesses the effectiveness of control and prevention measures, including vaccination and other public health interventions. This science will help decipher transmission dynamics, burdens of illness, and strategies in reducing the incidence and impact of infectious diseases on this planet.