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![Stability of West Nile virus in lysis solution and its implication on One Health](https://image.oaes.cc/3ff1525f-3d73-4497-a243-18d1170fc6af/4421.fig.3.jpg)
Figure 3. Weekly mean cyclic threshold difference of each sample set. The difference was calculated by taking the mean cyclic threshold value of a sample set, on a specific week, minus the initial mean cyclic threshold value for the corresponding sample set. The cyclic threshold values dropped an average of 3.5 values from their initial cyclic threshold value. *Denotes freeze-thaw.