Co-citation analysis of journals and dual map of cited journals and cited journals. (A) Co-citation analysis of journals. Journals were divided into four clusters according to their preferred content. The co-citation between Infection and Immunity and Journal of Immunology was the most significant, showing that the contents of both journals are very similar. Furthermore, the three major journals that published articles on TB vaccines are Infection and Immunity, the Journal of Immunology, and Vaccine. (B) Dual map of journals in terms of citing journals and cited journals. (B) Two main pathways were observed, but both mainly cite the literature of the same discipline (molecular biology and genetics).