Garki Project, Nigeria (1969–1976)
A WHO-sponsored trial in a savanna district of northern Nigeria tested indoor spraying and mass drug administration against malaria. Transmission dropped sharply during the trial, then rebounded once interventions stopped.
The project concluded that vector control was hard to sustain and that malaria returned quickly after the trial ended.
It shaped global expectations about how difficult malaria elimination is in tropical Africa, tempering eradication ambitions for decades.
The 2024 Bioko funding lapse produced the same pattern — cases rose 41% before spraying resumed — confirming that even a proven model depends on uninterrupted funding.
