Tuberculosis (TB) is a contagious and potentially life-threatening infectious disease caused by the bacteria Mycobacterium tuberculosis. It primarily affects the lungs and can cause serious complications if left untreated. Symptoms of TB include a chronic cough, chest pain, fever, night sweats, and weight loss. Diagnosis of TB is typically done through chest x-rays, sputum analysis, and a skin test. Treatment of TB usually involves antibiotics taken for a prolonged period of time, typically up to 9 months. TB can be prevented through proper hygiene and a healthy lifestyle. Vaccines are available to individuals who are at a high risk for the disease.