Generation time in epidemiology is defind as -: (A) The interval between marriage and the bih of first child, (B) The interval of time between primary case and secondary cases, (C) The interval of time between invasion by infectious, (D) agent and appearance of first sign or symptom of the disease in question
Answer is B. . generation time is defined as the time interval between the receipt of infection by a host and maximal infectivity of that host.it is roughly equal to incubation period.but not the same.generation time refers to transmission of infection whether clinical or subclinical. ref:park&;s textbook,ed 22,pg no 96