Gamboa Pérez, MaríaLópez Herrero, María Jesús2023-06-172023-06-1720182227-739010.3390/math6080128https://hdl.handle.net/20.500.14352/19085This paper deals with an infective process of type SIS, taking place in a closed population of moderate size that is inspected periodically. Our aim is to study the number of inspections that find the epidemic process still in progress. As the underlying mathematical model involves a discrete time Markov chain (DTMC) with a single absorbing state, the number of inspections in an outbreak is a first-passage time into this absorbing state. Cumulative probabilities are numerically determined from a recursive algorithm and expected values came from explicit expressions.engAtribución 3.0 Españahttps://creativecommons.org/licenses/by/3.0/es/journal articlehttps://doi.org/10.3390/math6080128https://www.mdpi.com/2227-7390/6/8/128open accessDiscrete time stochastic modelfirst-passage timetime between inspectionsEstadística1209 Estadística