Cancer is one of the examples of diseases in which microorganisms have no part in causing.
Cancer is a class of diseases in which a group of cells display the traits of uncontrolled growth.
Causes
- 1 Chemical carcinogens
- 2 Ionizing radiation
- 3 Infectious diseases
- 4 Hormonal imbalances
- 5 Immune system dysfunction
- 6 Heredity