The dodo bird did not have any fear from humans which is why they were easily hunted down by sailors. Archaeological evidences prove further the mass killings of these birds. Besides, humans also introduced some other animals such as dogs, rats, pigs, and cats which plummeted dodo bird population. Habitat loss is another primary reason for the dodo bird extinction.
The first time HPV was discovered was back in 1956 by a group of scientists. It was in 1984, when Harald zur Hausen discovered, cloned, and attributed cervical cancer to HPV 16 and 18.Throug his research, he has contributed to the production of the vaccines [6].HPV gets its name because certain strain causes warts, also known as papillomas [4].n the other hand, the high risk types, like HPV 16 and 18 have been linked to cancer of the vulva, vagina, cervix, anus and penis. [2] For the most part, most HPV infections do not pose any real harm, even if infected by multiple types.
For example, HPV types 6 and 11 cause 90% of all genital warts. HPV types 6 and 11 also cause recurrent respiratory papillomatosis, a less common disease in which benign tumors grow in the air passages leading from the nose and mouth into the lungs. High-risk HPVs, which can cause cancer. About a dozen high-risk HPV types have been identified. Two of these, HPV types 16 and 18, are responsible for most HPV-caused cancers (2, 3). HPV infections are the most common sexually transmitted infections in the United States. About 14 million new genital HPV infections occur each year .