1 in 8 cancer cases worldwide are caused by infections, study finds
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Study finds 1 in 8 cancer cases globally caused by infections like HPV and H. pylori.
A Lancet Oncology study by IARC/WHO estimates infections caused 2.3 million new cancer cases in 2024 (12% of all cases). Leading agents: Helicobacter pylori (760k cases, stomach cancer), HPV (750k cases, cervical and other cancers), hepatitis B/C (liver cancer), and Epstein-Barr virus (260k cases, newly recognized). Rates are highest in eastern Asia and sub-Saharan Africa; Canada's rate is about 4%, with 7,000 diagnoses yearly. HPV vaccine uptake has plateaued, threatening Canada's 2040 cervical cancer elimination goal.
What commenters are saying
Top comment argues most cancers are environmental, with obesity, bad diet, smoking, and drinking responsible for 50%+ of cases, sparking debate on alcohol's relative risk. Many commenters note that on long enough timelines cancer risk approaches 100% regardless of lifestyle, but emphasize that healthy habits shift onset later. A detailed model suggests carcinogenesis stems from cell death and chronic inflammation driving evolution toward rebellion. Some pushback: fatalism can undermine prevention efforts.