GSK Biologicals' investigational TB vaccine

The incidence rate of definite pulmonary TB disease (or 100 Person-years rate) was calculated as the number of subjects reporting at least one case (n) in a group, over the sum of follow-up period expressed in years (T) in the same group, and multiplied by 100. Case definition 1 = subject with clinical suspicion of pulmonary TB disease\*, with Mycobacterium tuberculosis (Mtb) complex identified from sputum specimen, taken before initiation of TB treatment, by Xpert MTB/RIF (Nucleic Acid Amplification Test to detect Mtb complex and resistance to rifampicin in sputum samples) and/or microbiological culture and confirmed Human Immunodeficiency Virus (HIV)-negative at the time of TB diagnosis. \*Clinical suspicion of pulmonary TB defined as subject presenting with 1 or more of the following symptoms: unexplained cough \> 2 weeks, unexplained fever \> 1 week, night sweats, unintentional weight loss, pleuritic chest pains, haemoptysis, fatigue or shortness of breath on exertion.