Table 1.

Variable description with model assumptions and initial values obtained by model validation assuming confirmed cumulative mortality data.

Variable	Description and modelling assumptions	Initial conditions (individuals)
N	Population in the Basque Country	2199711
S	Population of nonquarantined susceptible individuals	2199671
E	Population of susceptible exposed individuals; infected individuals with no symptoms and no infectivity	30
I	Population of infected individuals with infective capacity and not quarantined; asymptomatic or not reported cases	10
Q	Population of quarantined infected individuals; reported cases	0
R	Patients recovered from COVID-19	0
D	Individuals deceased due to COVID-19	0
V	Vaccinated and protected population against COVID-19	0

Initial values in this table are the ones used in the model verification/evaluation on the first wave data. For the verification/evaluation on the second wave data and simulations of vaccination scenarios, changes to these initial values are defined further on.