Every year on 24 March, World TB Day commemorates the day in 1882 that Dr. Robert Koch identified the tubercle bacillus as the cause of the disease. Despite advances in modern medicine, TB is still endemic in many parts of the world, causing nearly 1.5 million deaths every year.

Image © | Child patients lying outside in beds on a terrace outside the Hospital of Alton, Hampshire, in the sun as part of their therapy | 1937, Wellcome Library, London