Renowned ballad singer Yoo Yeol recently appeared on the 343rd episode of the tvN program 'You Quiz on the Block' to share his harrowing 7-year battle with pulmonary fibrosis. Marking his 40th anniversary since debut, Yoo recounted how his health deteriorated to the point where his weight dropped to 41kg and his heart rate reached 190 beats per minute. He faced critical moments, including two failed lung transplant attempts, cardiac arrest, and discussions regarding life-sustaining treatment, ultimately leading him to write a will for his 12-year-old son. Having since recovered, he expressed profound gratitude for his return to public life. | Renowned ballad singer Yoo Yeol recently appeared on the 343rd episode of the tvN program 'You Quiz on the Block' to share his harrowing 7-year battle with pulmonary fibrosis. Marking his 40th anniversary since debut, Yoo recounted how his health deteriorated to the point where his weight dropped to 41kg and his heart rate reached 190 beats per minute. He faced critical moments, including two failed lung transplant attempts, cardiac arrest, and discussions regarding life-sustaining treatment, ultimately leading him to write a will for his 12-year-old son. Having since recovered, he expressed profound gratitude for his return to public life.