A September 2026 global analysis links around one in eight cancers to infections, highlighting the value of vaccination, screening and targeted care.
Cancer prevention can begin long before a tumour appears, sometimes with a vaccine or treatment for an infection.
What the new study found
An International Agency for Research on Cancer analysis published online on 28 September 2026 estimated that infections caused about 2.3 million new cancer cases worldwide in 2024, roughly 12% of the total. The biggest contributors included H. pylori, HPV, hepatitis B, Epstein–Barr virus and hepatitis C. IARC: Global burden of cancer attributable to infections in 2024
The update included additional infection–cancer relationships, including evidence linking Epstein–Barr virus to some stomach cancers. Its headline number describes estimated cancer cases in 2024, not diagnoses counted during 2026.
What that number does not mean
It does not mean that one in eight people with an infection will develop cancer. This is a population-level estimate, not an individual’s risk forecast or an India-specific percentage. A positive HPV test, for example, is not a cancer diagnosis: most HPV infections clear naturally, while persistent high-risk infections can cause precancerous changes. WHO: Cervical cancer
Prevention has several parts
IARC highlights existing tools: HPV and hepatitis B vaccination, appropriate testing and treatment for certain infections, and cervical screening. These measures can reduce cancer risk, but access and eligibility vary. IARC: Questions and answers on infection-attributable cancers
Vaccination and screening do different jobs. HPV vaccines help prevent infection with important cancer-causing types; cervical screening can detect precancerous changes. Screening remains important after HPV vaccination. H. pylori can be tested for and treated when clinically appropriate; this headline is not a reason to start antibiotics yourself. WHO: Cervical cancer; US National Cancer Institute: Infectious agents
Questions to take to your next appointment
- Based on my age and previous doses, should I discuss HPV or hepatitis B vaccination?
- Am I due for cervical screening, even if I have been vaccinated?
- Do my symptoms, history or exposures justify testing for hepatitis or H. pylori?
In India, ask your clinician which locally available tests and vaccination schedules fit your situation.
Sources and dates
- IARC: Global burden of cancer attributable to infections in 2024 — study: 28 September 2026; web announcement: 29 September 2026
- WHO: Cervical cancer — updated 3 July 2026
- IARC: Questions and answers — 28 September 2026
- US National Cancer Institute: Infectious agents — updated 4 March 2019; established background
Editorial/source check: 17 October 2026.
Medical disclaimer: Educational information only. Testing, vaccination and treatment decisions should be individualised by a qualified clinician. This article does not replace personalised medical advice.
© 2026 EndYourIllness. Original text. Third-party names and marks belong to their respective owners.
