<prompt> Which of the following set is termed as epidemiological triad:Endemic, epidemic and outbreaksAgent, host and environmentIncidence, prevalence and disease loadAgent, man and disease  <response>: Ans b Agent, host and environmentRef : K. Park 23rd ed. 33-34, Park 19th 30A broad concept of disease causation that synthesized the basic factors of agent, host and environment see adjacent figureThis model--agent, host and environment-- has been in use for many years. It helped epidemiologists to focus on different classes of factors, especially with regards to infectious diseases. 