Fig. 3

Comparison of the acute and chronic infected populations in the context of disease extinction is conducted for systems (2) and (29). The results are presented as follows: (a) The deterministic HCV model (29) for the acute infected population with different time delays. (b) The deterministic HCV model (29) for the chronically infected population with different time delays. (c) The stochastic HCV model (2) for the acute infected population with different time delays. (d) The stochastic HCV model (2) for the chronically infected population with different time delays.