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  • 简介:Inthispaper,westudyatypeofsusceptible-exposed-infected(SEI)epidemicmodelwithvaryingpopulationsizeandintroducetherandomperturbationoftheconstantcontactrateintotheSEIepidemicmodelduetotheuniversalexistenceoffluctuations.Undersomemoderateconditions,thedensityoftheexposedandtheinfectedindividualsexponentiallyapproacheszeroalmostsurelyarederived.Furthermore,thestochasticSEIepidemicmodeladmitsastationarydistributionaroundtheendemicequilibrium,andthesolutionisergodic.Somenumericalsimulationsarecarriedouttodemonstratetheefficiencyofthemainresults.

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