Research Article
Hopf-Bifurcation Analysis of Pneumococcal Pneumonia with Time Delays
Table 1
Description of variables.
| Variable | Description | [unit] |
| S(t) | Number of susceptible individuals at time | individual | | Number of vaccinated individuals at time | individual | | Number of asymptomatic individuals at time | individual | | Number of individuals with one serotype not covered by the vaccine | individual | | Number of infectious individuals at time | individual |
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