The malaria vaccine pipeline — from RTS,S to R21 — represents one of Africa's mo...
Africa Trials
1
US Trials
52
Gap Ratio
52x
Nations
54
Key Finding
Africa hosted 1 malaria vaccine trials versus 52 in the United States, a 52-fold disparity in research investment.
Regional Comparison
Distribution Analysis
Inequality Profile
Temporal & Structural
Why It Matters
The malaria vaccine pipeline — from RTS,S to R21 — represents one of Africa's most important research investments, but trial infrastructure remains concentrated in East African sites.
The Evidence 135 words · target 156
In the burden-versus-investment landscape of African health research, does the distribution of malaria vaccine trials across African nations reveal a systematic research gap? This cross-sectional audit evaluated 23,873 African and 190,644 United States interventional trials registered on ClinicalTrials.gov through April 2026. Investigators computed the Kaplan-Meier cumulative registration curve as the primary estimand using registry metadata for each nation. Africa hosted 1 malaria vaccine trials (0.0% of its portfolio) compared to 52 in the United States, yielding a 0.0-fold disparity in per-population investment. Temporal analysis showed 17.1-fold growth in African trial registrations from 2000-2005 to 2021-2025, though the gap with high-income regions persisted. These results expose a fundamental mismatch between where disease burden falls and where research investment flows across Africa. Interpretation is limited by reliance on ClinicalTrials.gov alone, which may undercount locally registered African studies.
Sentence Structure
Question
In the burden-versus-investment landscape of African health research, does the distribution of malaria vaccine trials across African nations reveal a systematic research gap?
Dataset
This cross-sectional audit evaluated 23,873 African and 190,644 United States interventional trials registered on ClinicalTrials.
Method
gov through April 2026.
Primary Result
Investigators computed the Kaplan-Meier cumulative registration curve as the primary estimand using registry metadata for each nation.
Robustness
Africa hosted 1 malaria vaccine trials (0.
Interpretation
0% of its portfolio) compared to 52 in the United States, yielding a 0.
Boundary
0-fold disparity in per-population investment.
Extra
Temporal analysis showed 17.
Extra
1-fold growth in African trial registrations from 2000-2005 to 2021-2025, though the gap with high-income regions persisted.
Extra
These results expose a fundamental mismatch between where disease burden falls and where research investment flows across Africa.
Extra
Interpretation is limited by reliance on ClinicalTrials.
Extra
gov alone, which may undercount locally registered African studies.