Up to 40% of global cancer cases could be prevented, according to a 2026 WHO and IARC analysis. The study highlights lung, stomach, and cervical cancers as the most preventable types. Tobacco remains the leading cause, responsible for 15% of new cancer cases, followed by infections at 10%, and alcohol at 3%.
Gender disparities show men are more affected, with 45% of their cancer cases linked to preventable causes versus 30% in women. Smoking accounts for 23% of male cases, while infections lead in women at 11%. Regional differences reveal East Asia carries the highest burden among men, whereas sub-Saharan Africa sees the highest rates for women.
Experts stress coordinated prevention strategies targeting tobacco control, vaccination, improved air quality, and healthier lifestyles. These measures could drastically reduce future cancer diagnoses and healthcare costs worldwide.