Fig. 1. Time interval distribution between the initial and recurrent diagnosis of Plasmodium vivax malaria. Of the 29 patients with recurrence, the time interval for 27 patients was available. Among these, 23 (85.2%) experienced a recurrence within 2 months. Fourteen (51.9%) experienced a recurrence within 35 days (dotted line). One patient experienced recurrence after nearly 2 years (possibly due to re-infection).