"Tuberculosis, which is preventable and curable, has reclaimed the title of the world’s leading infectious disease killer, after being supplanted from its long reign by Covid-19. But worldwide, 40 percent of people who are living with TB are untreated and undiagnosed, according to the World Health Organization."

https://www.nytimes.com/2023/11/06/health/tuberculosis-tb-treatment-vaccine-diagnosis.html