Last year over nine million people developed TB around the world, according the World Health Organisation, having risen by almost 500,000 during the past 12 months, although the number of people dying from the condition continues to decline.

None the less, campaigners say that one of the biggest problems in tackling the deadly disease was gauging how many people were affected. About 1.5 million people died from TB in 2013 and it remains the second biggest killer disease from a single infectious agent.