TB, an airborne infectious disease caused by a bacterium known as Mycobacterium tuberculosis, has afflicted man for millennia. It has claimed over a billion lives in the last 200 years, more than any other infectious disease in history.
The World Health Organisation (WHO) declared tuberculosis a global emergency in 1993. Twenty-five years on, TB is reported by the WHO as the leading cause of death globally from a single infectious agent, with an estimated 1.6 million deaths and 10 million persons afflicted in 2017.
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