Figure 2. Cumulative and annual number of publications about tuberculosis vaccines each year since 1995.

Publications were counted if they appeared in a PubMed search for terms ‘tuberculosis vaccine’ in either title or abstract for each given year of publication, using the search query (tuberculosis vaccine [Title/Abstract]) AND (‘YYYY’[Date - Publication]). Note that the 2012 figure includes up to end of October 2012.