1 in 8 cancer cases worldwide are caused by infections, study finds
While infections are rarely high on the list, new research shows one in eight cancers worldwide are actually caused by them. They found the largest number of cancer cases attributed to infections globally were caused by the bacterium Helicobacter pylori, which can increase the risk of stomach cancer and accounted for 760,000 cases, predominantly in eastern Asia.Human papillomavirus (HPV) followed close behind. HPV, which causes 100 per cent of cervical cancer cases and also anal, vulvar, vaginal, penile and some head and neck cancers, accounted for nearly 750,000 new cases globally, with high rates in sub-Saharan Africa.
- ▪While infections are rarely high on the list, new research shows one in eight cancers worldwide are actually caused by them.
- ▪They found the largest number of cancer cases attributed to infections globally were caused by the bacterium Helicobacter pylori, which can increase the risk of stomach cancer and accounted for 760,000 cases, predominantly in eastern Asia.H
- ▪HPV, which causes 100 per cent of cervical cancer cases and also anal, vulvar, vaginal, penile and some head and neck cancers, accounted for nearly 750,000 new cases globally, with high rates in sub-Saharan Africa.
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| Original publisher | Hacker News (Front Page) |
| Canonical URL | https://www.cbc.ca/lite/story/9.7361622 |
| Publication time | Tue, 29 Sep 2026 12:33:50 +0000 |
| Retrieval time | 2026-09-29T13:21:22.472Z |
| Last seen | 2026-09-29T13:21:22.472Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
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| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | sHbXX7xl01Gz · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
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Opening excerpt (first ~120 words) tap to expand
1 in 8 cancer cases worldwide are caused by infections, study findsTashauna Reid(external link) | CBC News | Posted: September 29, 2026 8:00 AM | Last Updated: Just nowResearchers estimate infections caused 2.3 million new cancer cases worldwide in 2024Image | Pakistan HPV VaccineCaption: A health worker shows vials of human papillomavirus (HPV) vaccine during a campaign aiming to protect girls from cervical cancer, in Karachi, Pakistan, in 2025. The virus causes 100 per cent of cases of cervical cancer.
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