The study was conducted from March to May in 2012, covering a total of 192 migrant aggregates, holding 28,174 temporary mobile/migrant workers and family members, and living in 8,018 households. Of these aggregates, 127 (66.1%) were located in Kawthaung township. The characteristics of study populations and aggregates are summarized in Table 1. More than 70% of the aggregates were identified as “large”. Around 87% of aggregates were in permanent places while 66.7% (8/12) of cut-off sites were temporary (see Figures 2 and 3). The ratio of migrant to permanent resident population in 192 aggregates was 0.66. Approximately half of the structure comprised male, aged ≥ 15 years and 57.7% of aggregates were occupied by palm oil plantation workers. Children under-five years contributed for 11.8% and night time forest dwellers were around 2,193, mostly in rubber plantations across all types of migrant aggregates (Table 1).