Table 1.

Events of the Ross model, their rates and probabilities of occurrence in a time interval of length dt.

event	transition	rate at which event occurs	probability of transition in time interval [t, t+dt]
infection of host	Y→Y+1	αI((H−Y)/H)	αI((H−Y)/H)dt
infection of vector	I→I+1	β(V−I)(Y/H)	β(V−I)(Y/H)dt
recovery of host	Y→Y−1	ξY	ξY dt
death of vector	I→I−1	δI	δI dt