Serial interval is a measure of
The gap in time between the onset of primary case and the secondary case is known as serial interval. By collecting information of the whole series of onset, we get a distribution of secondary cases from which we can guess the incubation period. Ref: 25th edition, Park's Textbook of Preventive and Social Medicine, Page no. 108
Sensitivity
Specificity
Incubation period
Positive predictive value
Epidemiology