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Study sites
| City | Country | Description | Population density |
|---|---|---|---|
| Lilongwe | Malawi | Peri-urban | 1541 people per km2 |
| Kampala | Uganda | Urban | 8800 people per km2 |
| Chitungwiza | Zimbabwe | Urban, peri-urban | 7279 people per km2 |
| Cape Town | South Africa | Urban | 1530 people per km2 |
| Durban | Urban | 1502 people per km2 | |
| Johannesburg | Urban—inner city residential neighbourhood | 48 000 people per km2 |
