GoKawiilWHO study: infections caused 2.3 million cancer cases globally in 2024
A study by the International Agency for Research on Cancer, published in The Lancet Oncology, estimates that infectious agents caused about 2.3 million new cancer cases worldwide in 2024, or roughly one in eight of all cases. Helicobacter pylori bacteria accounted for the largest share at 760,000 stomach cancer cases, mostly in eastern Asia, followed by HPV with nearly 750,000 cases concentrated in sub-Saharan Africa, and hepatitis B and C viruses linked to many liver cancer cases. Researchers also expanded their list of infection-linked cancers by 16 additional types.