Transmission_rate,_beta 10 0.1 0.1 1 Recovery_rate,_gamma 1 Proportion_in_High_risk_group 0.2 Vaccinated_proportion_in_High_risk_group 0.7 Vaccinated_proportion_in_Low_risk_group 0.4 Initial_High_risk_Infectious 0.00001 Initial_Low_risk_Infectious 0.001 Run_until_time 15