<prompt> Period between the possible time of detection and the possible time of diagnosis isLead timeScreening timeGeneration timeSerial interval  <response>: Ans. a Lead time Ref. Parks textbook of PSM 22ndp 95Lead Time It is advantge gained by screening, i.e., period between diagnosis by early detection and diagnosis by other means. It is period between the possible time of detection and possible time of diagnosis.Latent Period Time between exposure to a risk factor and subsequent development of clinical manifestations of a particular disease.Sreening Time Interval between first clinical detection and final critical point.Seriai Interval Time gap between onset of primary and secondary case. It is the measure of incubation period. 