| 1 | However, not all people infected with TB bacilli will become sick. | |
| 2 | Someone in the world is newly infected with TB bacilli every second. | |
| 3 | Overall, one-third of the world's population is currently infected with the TB bacillus. | |
| 4 | People ill with TB bacteria in their lungs can infect others when they cough. | |
| 5 | Overall, one third of the world's population is currently infected with TB. |