On March the 24th 1882 Dr Robert Koch announced that he had discovered the TB bacillus, the cause of tuberculosis.
Here are a couple of links that highlight the problem that still blights so many people's lives across the world - almost 130 years on from Dr Koch's discovery.
A moving and enlightening video about TB in India - how the poorest cannot afford the expensive drugs.
TB in pictures, photographer David Rochkind has documented the disease in Mumbai. One mother's story about her struggle with TB in Chechnya.
