Throughout human history, it is estimated that over 1 billion people have succumbed to Tuberculosis. The deadly bacterial infection targets the immunocompromised population as well as those who have weakened their lungs through smoking. It is believed that the first cases of tuberculosis appeared over 17,000 years ago in the wild by infecting bison. There is also a theory that puts the disease in humans around the same time. But, it is unclear whether humans or bison were the first carriers of Tuberculosis.
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