Each participant was asked to respond to a questionnaire, with questions regarding socio demographics, migratory pattern, work history, history of malaria infection, healthseeking behaviour, knowledge about malaria and access to health messages. Respondents were asked about the size of their personal networks; both how many people they perceived or knew as migrant workers in their areas, and for weighting, the number of migrant workers from their country of origin who were: (1) aged above 15 and currently residing in the area, (2) personally known and working in this area, (3) personally met in the past 30 days, (4) personally known male workers, (5) personally known female workers, and (6) personally known and recruited into the study.