One in six cancers – two million a year globally – are caused by largely treatable or preventable infections, new estimates suggest.
The Lancet Oncology review, which looked at incidence rates for 27 cancers in 184 countries, found four main infections are responsible.
These four – human papillomaviruses, Helicobacter pylori and hepatitis B and C viruses – account for 1.9m cases of cervical, gut and liver cancers.
Most cases are in the developing world.
The team from the International Agency for Research on Cancer in France says more efforts are needed to tackle these avoidable cases and recognise cancer as a communicable disease