All cancers are caused by viruses.

Question

Quizplus · Accepted Answer

Not all cancers are caused by viruses. In fact, many different factors can contribute to the development of cancer, including genetic mutations, environmental factors (such as exposure to certain chemicals or toxins), and lifestyle factors (such as smoking or poor diet). While some cancers are caused by viruses, such as cervical cancer (caused by human papillomavirus) and liver cancer (caused by hepatitis B or C), the vast majority of cancers are not caused by viruses.

All Cancers Are Caused by Viruses