Pauline van den Driessche
Department of Mathematics & Statistics
University of Victoria pvdd@Math.UVic.CA
Time delays are often used to model mechanisms (e.g., the
infective period) in the dynamics of epidemics. Such models
can be formulated as functional differential and/or integral
equations. A flavor of the modeling process and the mathematical
tools used in the analysis is given. The ideas are illustrated
by an SIS model in a variable size population with a constant
delay corresponding to the infective period.