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Table 4 SI approximation of dengue transmission among visitors
| \( \begin{array}{l}\frac{d{S}_H}{dt}=-\lambda (t){S}_H-\mu {S}_H,\\ {}\frac{d{I}_H}{dt}=\lambda (t){S}_H-\left(\mu +\gamma +\alpha \right){I}_H.\end{array} \) (11) |
