Fig. 5
From: Risk factors for malaria in high incidence areas of Viet Nam: a case–control study
Travel origins and destinations by district for cases and controls. Percentages are of the total number of people resident in that district who reported travel, shown at the top of each column as volume of travel. Only districts with minimum 5 people resident in them are shown. Destination districts are ordered from north to south (top to bottom) and districts of residence are grouped by province and ordered from south to north (left to right)