Features of HDSS study sites
| Host country | Site urbanicity | Size of site (km2) | Population size (approx.) | HDSS inception year |
| Ghana98 | Rural | 7162 | 140 000 | 2003 |
| Ghana99 | Rural | 1675 | 156 735 | 1992 |
| Kenya15 | Rural | 891 | 280 000 | 2000 |
| Kenya29 100 | Urban | 5 - 6.5 | 88 974 | 2002 |
| Malawi67 | Rural | 135 | 39 000 | 2002 |
| South Africa28 | Rural | 438 | 139 250 | 2000 |
| Uganda27 | Rural | 28 | 23 000 | 1989 |
HDSS, Health and Demographic Surveillance Systems.