March 24 is World Tuberculosis Day, so in today's edition of our Medical Myths series, we will focus on some of the misunderstandings associated with tuberculosis (TB). We cover the role of genetics, treatment, transmission, and more. TB is a bacterial infection. It primarily affects the lungs, but it can also impact other parts of the body. Symptoms include a chronic cough with bloody mucus, fever, and night sweats. Another common symptom is weight loss, which is why people used to call TB "consumption." The bacteria that cause TB, called Mycobacterium tuberculosis , spread from one individual to another through droplets expelled during coughing or sneezing. After transmission, the disease can progress in different ways, depending on the response of the host immune system. TB has affected humans for thousands of years, and it is still one of the world's deadliest communicable diseases. Each day, around 4,000 people die from it. According to the Worl...