<prompt> True for epidemiological triad: March 2012Time, place, personAgent, host, environmentDisease, prevention, treatmentAgent, man, disease  <response>: Ans: B i.e. Agent, host, environment Some impoant terms Epidemiological triad is a broader concept of disease causation that include the basic factors of agent, host and environment Germ theory of disease is generally referred to as one-to-one relationship between causal agent and disease. The disease model accordingly is: Disease agent Man Disease. 