<prompt> Incubation period of peussis is -7 days7-14 days14-28 days28 days  <response>: Ans. is b i.e., 7-14 days Peussis After an incubation period of about 1-2 weeks, the disease takes a protracted course comprising three stages, - the catarrhal, paroxysmal and Convalescent - each lasting approximately two weeks. Remember o Catarrhal stage is the stage of maximum infectivity. o Maximum complications occur in Paroxysmal stage. 