Table 1.

Values of transmission rate, τ, and recovery rate, γ, for the measles- and mumps-like diseases used throughout the paper. These are calculated from the pairwise secondary attack rate p as derived by Hope-Simpson [25] and from the expected infectious periods, IP [2]. (All time-scales are in days).

	p	IP	τ	γ
measles	0.756	7	1.7822	0.143
mumps	0.311	8	0.4118	0.125