Table 1 Description of parameters in system (1).
Parameters | Definition |
|---|---|
\(\beta\) | The infection rate of infected |
\(\epsilon\) | The failure rate of the natural immunity of recovered |
\(\sigma\) | The failure rate of vaccinated |
\(\alpha\) | The vaccination rate for susceptible |
\(\theta\) | The immunization loss rate of vaccinated |
\(\gamma\) | The rate at which recovered become susceptible after natural immunity fails |
\(\eta\) | Recovery rate of the infected |
