  In this work, we have developed a Coxian distributed SEIR model in
incorporating an empirical incubation period. We show that the global dynamics
are completely determined by a basic reproduction number. An application of the
Coxian distributed SEIR model using data of an empirical incubation period is
explored. The model may be useful for resolving causing the realistic intrinsic
parts in classical epidemic models since Coxian distribution approximately
converges to any distribution.
