Susceptible-Exposed-Infected-Susceptible Model with Simple Demographics

Susceptible-Exposed-Infected-Susceptible Model with Simple Demographics

SEIS_demographics_ode(t, x, params)

Arguments

t

The timestep over which to calculate derivatives

x

A numeric vector of compartment populations.

params

A named vector of parameter values.

Value

A vector of derivatives

Examples

##Model Input
S_0 <- 989
E_0 <- 10
I_0 <- 1
beta <- 3
chi <- 0.5
gamma <- 1/2
mu <- 1/81
parameters <- c(beta = beta, gamma = gamma,
 chi = chi, mu = mu)
inits <- c(S = S_0, E = E_0, I = I_0)

SEIS_demographics_ode(1, inits, parameters)
#> [[1]]
#>         S         S         E 
#> -2.331198 -2.156457  4.487654 
#>