We model four scenarios, with one infectious individual (index case) in each of the four cabins. The parameter q i represents the rate of production of infectious quanta of H1N1 in cabin i. The subscript to q signifies the cabin class. If there is no infectious individual in a cabin i then q i is set equal to zero. The infectivity of H1N1 is currently unknown. However, empirical data indicate that it appears to be equally (or slightly less) transmissible than seasonal strains of influenza [5, 6] . Therefore, in each scenario we varied the quanta production rate of the index case (q i ) from 50 to 128 quanta/hour, based on infectivity estimates for seasonal strains of influenza [2, 7, 12] .