Table 2.
Trends in childhood immunization articles output from Africa indexed by PubMed (1974 to 2010)
| Publications | |||||
|---|---|---|---|---|---|
| Country | 1974 to 1980 | 1981 to 1990 | 1991 to 2000 | 2001 to 2010 | 1974 to 2010 |
| South Africa | 21 | 65 | 153 | 107 | 346 |
| Nigeria | 15 | 30 | 42 | 67 | 154 |
| Gambia | 1 | 20 | 43 | 40 | 104 |
| Egypt | 8 | 7 | 37 | 47 | 99 |
| Kenya | 11 | 16 | 24 | 36 | 87 |
| Senegal | 5 | 13 | 29 | 23 | 70 |
| Ghana | 11 | 4 | 13 | 26 | 54 |
| Zimbabwe | 1 | 14 | 22 | 9 | 46 |
| Ethiopia | 2 | 3 | 20 | 19 | 44 |
| Uganda | 6 | 7 | 10 | 17 | 40 |
| Burkina Faso | 0 | 5 | 11 | 24 | 40 |
| Tanzania | 1 | 8 | 9 | 21 | 39 |
| Malawi | 0 | 4 | 12 | 18 | 34 |
| Sudan | 1 | 11 | 11 | 10 | 33 |
| Zambia | 1 | 4 | 7 | 16 | 28 |
| Democratic Republic of Congo | 0 | 7 | 14 | 5 | 26 |
| Cameroon | 6 | 7 | 5 | 7 | 25 |
| Mali | 6 | 4 | 4 | 11 | 25 |
| Cote d`Ivoire | 2 | 6 | 8 | 9 | 25 |
| Mozambique | 0 | 8 | 3 | 13 | 24 |
| Morocco | 3 | 3 | 4 | 12 | 22 |
| Chad | 0 | 1 | 8 | 13 | 22 |
| Guinea-Bissau | 0 | 3 | 5 | 13 | 21 |
| Tunisia | 2 | 6 | 6 | 5 | 19 |
| Guinea | 0 | 0 | 10 | 9 | 19 |
| Togo | 2 | 3 | 6 | 7 | 18 |
| Angola | 0 | 0 | 10 | 6 | 16 |
| Niger | 1 | 0 | 6 | 8 | 15 |
| Madagascar | 1 | 1 | 6 | 7 | 15 |
| Somalia | 2 | 6 | 3 | 4 | 15 |
| Congo-Brazzaville | 0 | 4 | 5 | 6 | 15 |
| Benin | 0 | 1 | 4 | 8 | 13 |
| Rwanda | 0 | 1 | 6 | 5 | 12 |
| Namibia | 0 | 0 | 7 | 2 | 9 |
| Central African Republic | 1 | 0 | 5 | 1 | 7 |
| Algeria | 1 | 3 | 2 | 0 | 6 |
| Gabon | 0 | 1 | 3 | 2 | 6 |
| Liberia | 0 | 2 | 2 | 2 | 6 |
| Burundi | 0 | 0 | 4 | 1 | 5 |
| Sierra Leone | 1 | 1 | 3 | 0 | 5 |
| Djibouti | 0 | 1 | 2 | 1 | 4 |
| Botswana | 0 | 0 | 4 | 0 | 4 |
| Swaziland | 0 | 0 | 3 | 1 | 4 |
| Eritrea | 0 | 0 | 1 | 3 | 4 |
| Lesotho | 0 | 0 | 3 | 0 | 3 |
| Libya | 0 | 2 | 1 | 0 | 3 |
| Comoros | 0 | 0 | 1 | 1 | 2 |
| Cape Verde | 0 | 1 | 0 | 1 | 2 |
| Sao Tome and Principe | 0 | 1 | 1 | 0 | 2 |
| Seychelles | 0 | 0 | 1 | 0 | 1 |
| Mauritania | 0 | 1 | 0 | 0 | 1 |
| Mauritius | 0 | 0 | 1 | 0 | 1 |
| Equatorial Guinea | 0 | 0 | 1 | 0 | 1 |
| Total: Africa output | 112 | 285 | 601 | 643 | 1641 |
| Total: World output | 1,702 | 3,485 | 5,816 | 6,679 | 18,388 |
| % world research output | 6.6 | 8.2 | 10.3 | 9.6 | 8.9 |