Fig. 3

Monthly malaria cases reported by Ministry of Public Health (A) and Royal Thai Army (B). In A, the orange shaded bars indicate the monthly number of Plasmodium vivax infections and the yellow shaded bars indicate the monthly number of P. falciparum infections and three mixed infections reported between January 2017 and March 2018). In B, the blue shaded bars indicate the monthly number of monthly malaria cases, as data on species types of RTA cases was unavailable from the routine malaria surveillance data. For both A and B, the red solid line indicates the epidemic threshold which was calculated as two standard deviations above the mean number of monthly cases averaged across the prior four years. The dashed green lines indicate the number of monthly malaria cases which were reported in the prior four years