The difference between these three types of zebras is only about where do zebras live and the answer is that they live at different places. One type of zebra wants to live on mountains and is known as a mountain zebras. Second type lives on plain, grassy lands and is called as Burchell's zebras. Third type of these animals is better known as Grevy's zebras. These zebras are the largest of all three types of the species.
Vulvar cancer. HPV can also cause cancer of the vulva, which is the outer or external part of the female genital organs. Nearly 7 out of 10 vulvar cancers and almost all vulvar pre-cancers are linked to infection with the high-risk HPV types.This is a much less common cancer than cervical cancer.hese types are called âhigh-riskâ because they can cause cancer. Doctors worry more about the cell changes and pre-cancers linked to these types, because they are more likely to grow into cancers over time. Common high-risk HPV types include HPV 16 and 18.
Today, it is estimated that viruses are responsible for almost 20 percent of cancer cases worldwide. Seven viruses have been connected to specific types of malignancies; itâs now known, for example, that the human papillomavirus (HPV) causes cervical cancer and some types of head and neck cancer.While viruses can cause cancer in a variety of ways, the actual mechanisms fall into two broad categories.In the direct method, oncoviruses (cancer-causing viruses) infect normal cells and slip some of their genes into the cellsâ DNA, causing the cells to produce a few abnormal proteins.n 1958, when scientists linked an aggressive form of leukemia to infection with a particular virus, some researchers took the discovery as evidence that nearly all cancers are caused by viruses.