Is cancer a modern disease?
Medical texts from ancient Egypt describe tumours. Cancer has been documented for thousands of years.
American Cancer Society · History of cancer
Is cancer inherited?
Inherited gene changes account for a small share of cases. They can increase the likelihood of developing certain types of cancer. The significance of family history varies from person to person.
National Cancer Institute · Family history and cancer
Can cancer spread through everyday contact?
You can hug and spend time with a person who has cancer without catching the disease. Some infections, including those caused by certain types of HPV, can spread and increase the risk of some cancers.
National Cancer Institute · Is cancer contagious?
Do dietary supplements protect against cancer?
For cancer prevention, the World Cancer Research Fund recommends meeting nutritional needs through food and avoiding supplements for that purpose. A healthcare professional can assess whether a supplement is appropriate for a specific need, such as a nutrient deficiency.
World Cancer Research Fund · Supplements and cancer prevention
Does air pollution raise cancer risk as much as smoking?
Outdoor air pollution increases the risk of lung cancer. Tobacco smoking is the leading risk factor for lung cancer. Individual risk depends in part on the intensity and duration of exposure.
International Agency for Research on Cancer · Lung cancer
Sources checked on 10 November 2026.
