A simulated dataset from a delay SIR model specified as following:

*\dot{S} = ρ(t)-β I_{τ}S\\
\dot{I} = β I_{τ}S-γ I*

The parameters are set at: *ρ(t)=4000\times(\sin(t)+2)*, *γ = 5*,
*β = 0.0012*, and *τ = 0.5*. We simulated the numerical solution from time *t=0* to *t=50* and the process is then sampled regularly ten times per unit time. Independent normal observational noise with sd = 100 is added to the numerical solution.

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A matrix of two columns. The first column is the observed state `S`

and the second column is the observed state `I`

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