| Popis: |
This chapter aims to show that cancer is becoming a global problem, with a growing case load in low-income countries (LIC); to describe the main agents that cause it; to report what is being done to reduce exposure to carcinogenic agents; and lastly to argue that primary prevention is by far the most effective and economic solution to fight cancer on a global scale. Every year in the world, there are more than 14 million new cases of cancer, which causes 8 million deaths. The frequency of tumours and other diseases varies according to geographical area and changes over time. Whereas in the first positions in high-income countries there are cancers of the breast, of the colon and of the lungs, LIC present much higher mortality rates for cancers of the stomach, liver and cervix uteri, all of which are widely or fully (cervix uteri) of infectious origin. |
