k1 = beta
k2 = omega
k3 = sigma
k4 = gamma
k5 = R_fixed
k6 = Fraction_infected
k7 = R_1
k8 = R_2
k9 = R_1_0
k10 = R_2_0
k11 = R_1_f
k12 = R_2_f
k13 = eta
k14 = USA
k15 = __cm_k15