Bandim Health Project (BHP) has cluster samples of women of fertile age and their prospectively registered children in all 9 health regions of Guinea-Bissau. A total of 182 clusters are included in the study. The first 100 clusters in the 5 most populous regions of Guinea-Bissau have been followed since 1990 (1).
The remaining clusters were added in 2006. Since the start in 1990 the clusters have been visited every sixth month to identify new pregnancies and to assess the situation of all children under 5 years of age and of all women of fertile age.
Since 2012 the clusters in three regions are visited every month and vaccines are provided to all eligible infants and some children are enrolled in a trial of early measles vaccination.
