No Title  |POLVER05_0 |1
d(S) / d(t) = -k1*S-k2*I*S 
d(I) / d(t) = k1*S+k2*I*S-k3*I-k4*I 
d(R) / d(t) = k3*I 
d(D) / d(t) = k4*I 
H=S+R
S(0) = 1386400000
I(0) = 770
R(0) = 0
D(0) = 0
k1=6e-7
k2=10.58e-9
k3=14.5645
k4=2.0e-3
t(0) = 0
t(f) = 76