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•A persistent cough (which lasts for more than 2 weeks)
• Cough with blood in sputum
• Fever for more than 2 weeks
• Pain in the chest
• Weight loss
• Night sweats
• Loss of appetite
TB bacteria spread through the air from one person to another. When a person with TB disease of the lungs or throat coughs, speaks, or sings, TB bacteria can get into the air. People nearby may breathe in these bacteria and become infected.
When a person breathes in TB bacteria, the bacteria can settle in the lungs and begin to grow. People with TB disease are most likely to spread it to people they spend time with every day. This includes family members, friends, and coworkers or schoolmates.