Sensitivity analysis: the proportion of chronically infected being quarantined , proportion of acute infections recovering spontaneously , effective contact rate , and modification parameter for infectiousness of quarantined are the most significant parameters. This means that even a small error in the estimation of these parameters can greatly affect the value of and hence the analysis of our model. Partial rank correlation coefficients (PRCC) are calculated with respect to . Parameters with modulus of PRCC values in excess of 0.5 are declared sensitive to .