By January 2019, 7 mobile units fitted with X-ray scanners and semi-auto analyzers will traverse the city offering free and rapid screening for tuberculosis. As part of the corporation's plan to achieve a TB free Chennai, the mobile vans will be stationed near slums, shelters, and orphanages to serve the poor. Senior health officials said the Greater Chennai area had 20 000 cases of TB, of which around 12 000 cases were treated in government hospitals. Cartridge-Based Nucleic Acid Amplification (CBNAAT) is available in all zones in the city. Each unit will have a field supervisor, lab technician and radiography staff, besides other paramedical staff. The health department is also mulling developing an app to keep tabs on TB prevalence.