sentence: Experts believe that one third of the world population is infected with 'M. tuberculosis'.
sentences_after: New infections occur at a rate of one per second. In 2007, about 13.7 million chronic cases were active globally. The number of tuberculosis cases has been decreasing since 2006, and new cases have decreased since 2002.
concept_name: expert
headings: Tuberculosis Prevalence
categories: Diseases caused by bacteria Pulmonology