Tuberculosis is responsible for the death of over 1.5 million
people every year [1]. This situation has worsened due to the
emergence of drug-resistance [2], HIV co-infection and the
insufficient protection of the Bacillus Calmette–Guérin (BCG)
vaccine, which is unable to protect adults against pulmonary TB
[3,4]. The efficacy of BCG in protecting against adult pulmonary
TB is unsatisfactory [5]. New and efficacious vaccines against TB