# Vaccines prevent 1 in 8 global cancer cases linked to infections

HPV and H. pylori account for over 1.5 million preventable cancers annually.

- **Source:** [Scientific American Content: Global](https://brifing.si/source/4f066134-e06d-4415-87ef-305e3dc2aba6)
- **Published:** 2026-09-29
- **Original article:** <https://www.scientificamerican.com/article/one-in-eight-new-cancers-are-likely-caused-by-infections-theres-an-easy-way-to-protect-yourself/>
- **On Brifing:** https://brifing.si/s/1c516d61-ee0e-4f18-b61c-0191d75ecc74

## Global cancer burden from infections

A 2024 Lancet Oncology study reveals 12% of global cancer cases (2.3 million) stem from preventable infections. Helicobacter pylori and HPV account for 65% of these cases, with hepatitis B and Epstein-Barr virus contributing significantly. The research updates 2018 findings, now including Epstein-Barr's newly confirmed links to stomach cancers and rare lymphomas.

## Geographic disparities in prevention

Sub-Saharan Africa shows higher infection-linked cancer rates due to limited healthcare investments. Unlike the U.S. with established cervical cancer screening, these regions lack infrastructure. Study author Gary Clifford emphasizes actionable solutions: targeted vaccination and testing programs could bridge this gap, directly reducing cancer incidence where burden is highest.

## HPV vaccine's proven impact

Since its 2006 U.S. introduction, HPV vaccination has cut cervical cancer rates by over 50% among vaccinated women aged 20-31. The vaccine prevents six cancers, including throat and anal variants. Global data confirms similar efficacy, with Memorial Sloan Kettering's Nancy Lee highlighting its critical role against rising HPV-related throat cancers in the U.S.

## Hepatitis interventions

Vaccination against hepatitis B and treatment for hepatitis C can prevent liver cancers, while antibiotics reduce H. pylori-related cancer risks. Moffitt Cancer Center's Anna Giuliano stresses these are direct, evidence-based interventions. The study underscores how existing medical tools—when deployed—can dramatically alter cancer epidemiology.

## Economic vs. health priorities

The research exposes a paradox: cancers caused by treatable infections persist despite available solutions. Clifford notes this reflects systemic underinvestment in prevention versus treatment. With infection-linked cancers disproportionately affecting lower-resource regions, the findings challenge global health prioritization and funding models.

## Vaccination as social equalizer

Population-wide vaccination programs emerge as cost-effective equalizers against infection-driven cancers. The study demonstrates how single interventions (like HPV vaccines) yield decades of protection. Clifford frames this as a rare public health win: simple, scalable solutions exist for complex problems, requiring only political will and infrastructure.

## Expanding virus-cancer links

Beyond known associations, the study confirms Epstein-Barr virus's role in stomach cancers—a recent discovery. This expanding understanding of viral oncogenesis suggests more cancers may have infectious origins yet to be identified. Researchers emphasize continuous investigation into microbial contributions to malignancy.

## Call for global action

The findings mandate coordinated efforts to integrate cancer prevention into infectious disease programs. With 2.3 million annual cases at stake, researchers urge prioritizing vaccination in national cancer control plans. Giuliano summarizes: 'We have the tools to prevent these cancers—implementation is the remaining challenge.'

## Sources covering this story

- https://www.scientificamerican.com/article/one-in-eight-new-cancers-are-likely-caused-by-infections-theres-an-easy-way-to-protect-yourself/ — 

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_Summary written by Brifing from the original reporting. Copyright in the original article belongs to its publisher; read the full piece at the link above._