A study from the Centers for Disease Control and Prevention estimates that 25 percent of the country's teenage girls, or almost 1 of 4 young girls, may have sexually transmitted diseases.

Girls aged 14 to 19 who are sexually active may have human papillomavirus (HPV), which is the leading cause of cervical cancer among women later in their lives. Other diseases are Chlamydia, trichomoniasis, and herpes simplex virus

The core sore virus that is passed on through kissing could help trigger Alzheimer's, scientists say.

Manchester University scientists have found that brain cells exposed to the herpes simplex virus-1 (HSV-1) produce large quantities of a chemical that builds up and prevents the transmission of messages in the brains of Alzheimer's sufferers

Quigley Pharma Inc. said Thursday its treatment against Herpes Keratitis, which occurs when the herpes simplex virus infects the eye, was not successful in animal studies; however, the company said it will continue to study the treatment for other possible uses.

Quigley said the tests to assess the effectiveness of QR-435 against the virus showed that the treatment did not stay in the eye long enough to penetrate the cells and reach the site of the virus. In other studies, the treatment eradicated the virus on direct contact

Researchers in the U.S. say they have found a chemotherapy drug that helps a cancer-killing virus. The virus will undergo testing in animals in order to identify claims it can aid in the treatment of human brain tumors.

Scientists at Ohio State University claim that the virus, which is another version of the herpes simplex virus, is injected into the tumor; here the virus enters the cancer cells and destroys them