Modi said immunisation in India had been going on for 30-35 years but at the prevailing rate of one per cent in 2014, another 40 years would have been required. "In the last three-and-a-half years, the rate has gone up to six per cent. By next year, I am confident of achieving 90 per cent immunisation in the country." Elaborating how the immunisation rate was increased, he said that the government had first identified the districts and regions out of its coverage and then the 'Mission Indradhanush', targeting these areas with better vaccines, medicines and deeper engagement at ground level, was launched. Terming frontline TB physicians and workers a crucial part of the TB Free India Campaign, he said those patients who overcome this disease also inspire others.