Surveillance effort
A total of 4451 pig serum samples were tested for IgG antibodies against JEV between 26 February 2013 and 23 December 2022. Of these, 3277 were also tested for IgM antibodies against JEV (28 October 2017 – 23 December 2022).
The annual number of samples tested for IgG (and IgM from 2017) ranged from 132—773 (Figure S1). The total number of samples tested from each district ranged from 253 in Azamgarh to 783 in Gorakhpur (Figure S2) with the greatest number overall from Gorakhpur division (n = 2569; 58%). In each age group of 4-5 months, 6-12months and >12 months, the number of samples collected was 1049, 1967, and 1435, respectively (Figure S3).