Schematic ofmodelstructure.Individu

Schematic ofmodelstructure.Individualsstartoffsusceptibletoinfection
(S). Uponinfectiontheyenteranincubationperiod(E), thenatsymptomonsetthey
become infectiousinthecommunity(I). Afterthispoint,theyeither:enterarecov-
ered state(R); remaininfectiousandgointohospital(H); ordieandremaininfectious
(D) untilburied(B). Hospitalisedinfectivesalsomoveeitherintotherecoveredor
dead compartment.Finally,the E compartment issplitaccordingtotherouteof
transmission inordertokeeptrackwhetheracasewasinfectedviacontaminated
syringes atthehospital(Eh) orbyperson-to-personcontact(Epp) witheitheran
infective inthecommunityoradeadbutnotburiedcase