Translations:Basic Field Epi: Course Resource Book/202/en
Soleh has a lot of chickens. All his chickens have got sick before with influenza. He noticed that from the day he put he put a sick bird in with the others it took between 3 - 5 days before all his other chickens became sick. Soleh has measured the incubation time of this influenza virus to be between 3 and 5 days.