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    Herpes Vaccine Looks Promising, Researchers Say

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    WebMD Health News

    May 4, 2000 -- Preliminary tests of a vaccine to fight the herpes simplex virus are showing that the vaccine can prevent illness and death in mice with herpes, according to scientists at the recent Conference on Vaccine Research in Washington.

    Researcher Ken S. Rosenthal, PhD, tells WebMD that the information being gleaned about viral infection and protection may eventually lead to effective prevention and treatment for diseases from malaria to cancer.

    The CDC estimates that 25% of the U.S. adult population is already infected with genital herpes, and 600,000 new cases will be diagnosed this year. While herpes is not fatal in adult humans, the painful, incurable disease disrupts lives, affecting the social and sexual behavior of people who are infected.

    Herpes can be passed unwittingly to sexual partners even when sores are not present, and can cause blindness if the eyes are infected. Over half of the infants who contract herpes from their mothers before delivery or during childbirth will die or develop serious complications.

    The vaccine, being developed with CEL-SCI Corp, "is working and it looks promising," says Rosenthal, a professor of microbiology and immunology at Northeastern Ohio Universities College of Medicine. He tells WebMD that some hard information on the research should be available within the next few months.

    "We've demonstrated that we can take different epitopes, which are molecular structures recognized by the immune system, and make them into vaccines that will immunize animals," Rosenthal tells WebMD. What's most exciting, he says, is that the researchers have discovered a way to direct the type of immune response that is caused. This is important because some diseases are controlled better by T-cells while others can be fought off more effectively by antibodies, he says.

    While both immune responses are important, they serve different purposes. T-cells work locally, at the site of infection, to attack an invading virus or bacteria. Antibodies, on the other hand, circulate in the blood, catching stragglers and preventing them from establishing a foothold. After an initial infection is controlled, says Rosenthal, what you want is a "memory response" in the body, to recognize and fight off the same invader if it's ever seen again. This "memory response" is what we call immunity.

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