III

• Sources that induce cancer

  • Infectious agent: Virus (Hepatitis virus) --> Liver cancer
  • Lifestyle: Diet, Exercise, Habit
  • Environmental: Pollution
  • Medical treatment: Radiation
  • Occupational exposure: Caves, Mines (Radiation)
• • Group 1: Carcinogenic to humans
  • Group 2A: Probably carcinogenic to humans
  • Group 2B: Possibly carcinogenic to humans (Limited animal evidence)
  • Group 3: Not classified as to its carcinogenicity to humans (Inadequate evidence)