The right option is show the distribution of cases by time
of onset
Determination of the incubation
period for a disease outbreak helps to show the distribution of cases by time
of onset. Incubation period is the time from the moment of exposure to a
pathogenic organism to the time that signs and symptoms of the disease appear. For
example the incubation period of Salmonella that causes typhoid fever is between
6 to 72 hours.
