Volume 9, Number 10—October 2003
Research
Environmental Risk and Meningitis Epidemics in Africa
Table 4
Risk | No. of districts | 1990 population in millions (%) |
---|---|---|
Low |
1,572 |
291 (49) |
Moderate |
971 |
162 (27) |
High |
482 |
102 (17) |
Very high |
251 |
44 (7) |
Not known |
5 |
1 (<1) |
Total | 3,281 | 600 |
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