The Human Papilloma Virus, so-called HPV, is one of the most widespread sexually transmitted diseases in America, with more than 20 million infected now and more than 6 million new cases detected each year. It is estimated that at least 50 percent of all sexually active people will be infected during their lifetimes. And while the silent disease may cause no symptoms in most cases, two strains of HPV cause some 70 percent of all cervical cancer, which...