Fig 12 -

a) The effect of the length of the incubation period (the period in which the infection is not detectable) and the disease period (the period in which the individual is infectious) is shown by changing these parameters of the disease. The curves correspond to a normal incubation and disease period, an increased incubation period by 3.5 days, a decreased incubation period by 3.5 days, and a decreased disease period by seven days. b) The outcome of two quarantine strategies. Strategy A: Enforce a quarantine 40 days after the outbreak, lift it after 20 days and enforce it again after 40 days. Strategy B: Enforce a quarantine 20 days after the outbreak and lift it 20 days later. The oscillatory curve is expected as the remaining active cases after the initial quarantine will be the initial spreaders for the next wave of the epidemic.