Which of the following is true of cancer and infectious agents?
A)Infectious agents cause nearly all of the cancers in developing nations.
B)Infectious agents cause less than 1% of cancers worldwide.
C)Infectious agents alone are typically not sufficient to cause cancer.
D)Infectious agents have been linked to cancers of reproductive organs but not to other cancers.

Question

Quizplus · Accepted Answer

While some infectious agents, such as certain strains of human papillomavirus (HPV), hepatitis B and C viruses (HBV and HCV), and Helicobacter pylori, have been shown to increase the risk of certain types of cancer, infectious agents are not the sole cause of cancer. Other factors such as genetics, lifestyle choices, and environmental exposures also play a role in the development of cancer. The percentage of cancers caused by infectious agents varies widely depending on the type of cancer and geographic location, but overall it is estimated that infectious agents cause around 15-20% of cancers worldwide.

Which of the Following Is True of Cancer and Infectious