RT Journal Article T1 Measuring infection transmission in a stochastic SIV model with infection reintroduction and imperfect vaccine A1 Gamboa Pérez, María A1 López Herrero, María Jesús AB An additional compartment of vaccinated individuals is considered in a SIS stochastic epidemic model with infection reintroduction. The quantification of the spread of the disease is modeled by a continuous time Markov chain. A well-known measure of the initial transmission potential is the basic reproduction number R, which determines the herd immunity threshold or the critical proportion of immune individuals required to stop the spread of a disease when a vaccine offers a complete protection. Due to repeated contacts between the typical infective and previously infected individuals, R overestimates the average number of secondary infections and leads to, perhaps unnecessary, high immunization coverage. Assuming that the vaccine is imperfect, alternative measures to R are defined in order to study the influence of the initial coverage and vaccine efficacy on the transmission of the epidemic. PB Springer SN 0001-5342 YR 2020 FD 2020 LK https://hdl.handle.net/20.500.14352/102070 UL https://hdl.handle.net/20.500.14352/102070 LA eng NO Gamboa y Lopez-Herrero (2020) «Measuring Infection Transmission in a Stochastic SIV Model with Infection Reintroduction and Imperfect Vaccine», Acta Biotheoretica, 68(4), pp. 395-420. doi:10.1007/S10441-019-09373-9 NO Ministerio de Ciencia, Innovación y Universidades (España) NO Comisión Europea NO Banco Santander NO Universidad Complutense de Madrid DS Docta Complutense RD 9 abr 2025