A good article.
BBC News - 'One in six cancers worldwide are caused by infection'
"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."