There are 130 unique types of Human Papillomavirus, several kinds of which are known to cause cervical cancer. Researchers are now finding, however, that HPV is also causing head and neck cancers in many regions of the world, according to Ohio State University’s Maura Gillison. Head and neck cancers are driven by environmental conditions such as tobacco use, Gillison said at last week’s AMP conference. Researchers are also currently studying the role of the oral microbiome in these diseases, she added. But incidences of HPV-positive head and neck cancers are increasing.