Figure 3.

Regional and country distribution of studies related to TB vaccines. (A) Geographical distribution map based on the total number of publications of vaccines for TB in different countries. For the corresponding relationship between the number of national publications and the diameter of the ball, see the corner mark in the lower left corner. The national cooperation group is divided into four groups according to the ratio of the number of participating countries to the total countries count. The United States carries out the most cooperation from several national cooperation projects, followed by the United Kingdom and China. (B) Times cited average per item, publications, and H-index of the top 5 countries. The United States ranks first with 2658 publications, followed by the UK with 1301 publications. From the average number of citations per article, it can be found that there is little difference between the UK and the USA in this index. They shared the top leadership position. When we can roughly estimate the value of a country/discipline from the H-index, we find that the United States has the highest output value, with an H-index of 155. 5. UL: University of London; SSI: Statens Serum Institute; LSHTM: London School of Hygiene Tropical Medicine; UCT: University of Cape Town; UO: University of Oxford.