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


Wiysonge et al. BMC Medicine 2013 11:66   doi:10.1186/1741-7015-11-66

Open Data