Tuberculosis remains the world's leading infectious killer, claiming an estimated 1.23 million lives last year, the UN health organisation said Wednesday as it warned that recent gains made against the disease were fragile. Deaths from TB were down three percent from 2023, while cases dropped by nearly two percent, the World Health Organization (WHO) said in its annual overview. An estimated 10.7 million people worldwide fell ill with TB in 2024: 5.8 million men, 3.7 million women, and 1.2