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Adolescent girls who had a serious school failure by the 12th grade -- being expelled, suspended or dropping out -- were significantly more likely to have suffered a serious bout of depression at the age of 21 than girls who did not have these problems.

Researchers have developed a novel four-component vaccine that protects monkeys against all four strains of dengue virus and may potentially offer protection to the millions of humans at risk worldwide. 

A new technology that spots tooth decay almost as soon as it's begun promises to reduce the need for drilling and filling. Drilling is one of the top dental phobias and puts thousands of people off visiting their dentist every year.

Scientists studying interactions of children with Autism Spectrum Disorders with bubble-blowing robots confirm what has been widely reported anecdotally: that ASD children in many cases interact more easily with mechanical devices than with humans. The researchers are developing a "control architecture" which will tailor robot interactions to the specific needs of ASD children to help therapists treating their condition.

Researchers appear to have solved at least a piece of a puzzle that has mystified physicians for years: why so many patients with asthma also suffer from GERD, or gastroesophageal reflux disease.

When individuals infected with HIV become infected with a second strain of the virus, the two viral strains can exchange genetic information, creating a third, recombinant strain of the virus that can evade immune system control. Now a study from the Partners AIDS Research Center at Massachusetts General Hospital shows that how and where viral strains swap DNA may be determined by the immune response against the original infecting strain.

Carbon dioxide laser resurfacing appears to be an effective long-term treatment for facial wrinkles, according to a report in the Archives of Facial Plastic Surgery.

Researchers have devised an ultrasound imaging technique that picks up subtle early evidence of peripheral arterial disease that current conventional tests miss. The test, if approved for clinical use, could lead to early treatments that would head off the serious complications that can result from the disease.

Human ancestors fought back against an ancient retrovirus with a defense mechanism that our bodies still use today. Evidence of this battle has been preserved in our DNA for millions of years.

Millions of people each day rely on transit, yet few urban area emergency plans have focused on its role in an emergency evacuation. Transit systems could play a significant role in transporting car-less and special needs populations in times of emergency, but these groups are inadequately addressed in most local emergency plans and evacuating them could easily exceed limited transit resources.