quality:corruption, information:extraction, structural:scholar_edition
Infection

Worldwide, approximately 18% of cancer deaths are related to infectious diseases. This proportion ranges from a high of 25% in Africa to less than 10% in the developed world. Viruses are the usual infectious agents that cause cancer but bacteria and parasites may also play a role. Oncoviruses (viruses that can cause human cancer) include:

Bacterial infection may also increase the risk of cancer, as seen in

Parasitic infections associated with cancer include: