  We propose an observer for a SIR epidemic model. The observer is then
uplifted into a predictor to compensate for time delays in the input and the
output. Tuning criteria are given for tuning gains of the predictor, while the
estimation-error stability is ensured using Lyapunov-Krasovskii functionals.
The predictor's performance is evaluated in combination with a time-optimal
control. We show that the predictor nearly recovers the performance level of
the delay-free system.
