Figure 5 Time series and decomposition of monthly Japanese encephalitis virus IgG seroprevalence in pigs aged 4-5 months in eastern Uttar Pradesh, India, February 2013 – December 2022.
Time series of IgG seroprevalence in pigs aged 6—12 and ≥12 months demonstrated similar patterns to IgG seroprevalence in pigs 4-5 months (Figures S12-13). In pigs 6-12 months, the IgG seroprevalence trend was statistically significantly reduced (-2.2%/month, 95% CI -3.4—-0.5, P = 0.01), and three peaks of IgG seroprevalence were observed in January – March, May, and September (Figure S12). In pigs >12 months, the trend was not significant (-0.6%/month, 95% CI -2.5—1.2, P = 0.51), and peaks of IgG seroprevalence were observed in April, then July-December (Figure S13).