A Florida State University scientist used a gene transfer technique to block the expression of a gene associated with clinical depression in a new study of mice that could lead to better treatment of human beings with this condition.

Intimate kissing with multiple partners almost quadruples a teenager's risk of meningococcal disease, finds a study published online by the BMJ today.

A new study from infectious disease researchers at The Miriam Hospital and Brown Medical School finds that a drug already given orally to treat HIV is also safe when applied as a vaginal microbicide gel. Microbicides are designed to prevent the sexual transmission of HIV and other sexually transmitted diseases and may be formulated as vaginal gels, foams, creams, or suppositories.

There is growing concern about the threats that farmed Atlantic salmon escapees constitute to wild salmon populations.