A vaccine aimed at reducing brain plaque didn't help cure Alzheimer's disease, researchers have found. The results of the five-year study disappointed scientists who believed that cutting down plaque levels in the brain would help reduce the symptoms of Alzheimer's.

The new research, led by Clive Holmes of Moorgreen Hospital in Southampton, looked at 80 patients with mild to moderate dementia. Researchers used amyloid-beta peptide on patients' brains to clear the plaque but results indicated that it didn't help patients live longer or slow the disease's progression

A human trial of a large-scale experimental AIDS vaccine has been cancelled following advice by a top scientist that it was unlikely to give useful results, the National Institutes of Health (NIH) said Thursday.

The vaccine trial, similar to a failed Merck and Co. product, was developed by the Vaccine Research Center at the National Institute of Allergy and Infectious Disease. In a study called PAVE 100, the agency planned to include 2,400 men in the United States

Tobacco companies have manipulated the menthol levels in cigarettes in recent years to hook new young smokers, a new study claims. The report by researchers at the Harvard School of Public Health could fuel support for more tobacco regulation.

The new study states that young people tolerate menthol cigarettes better than harsher non-menthol cigarettes. The low-level menthol cigarettes make it easier to begin smoking but as smokers become more accustomed to menthol, they prefer stronger menthol sensations

Children born prematurely are more likely to have medical and social disabilities in adulthood, new research says. The factors can hinder the preemies from getting a well-paid job and starting a family, according to a study in the New England Journal of Medicine.

Over the last four decades, the advancement in medical science has led to better survival in premature babies but studies suggest that it may come at the cost of disabilities and hurdles in adult life

Anti-rejection drugs given after life-saving organ transplants put them at a higher risk of developing cancer, according to a new study.

Researchers at Harvard Medical School implanted human kidney cancer cells into mice and then gave the rodents cyclosporine, an immunosuppressant drug often used after transplants. Mice that received the drug grew tumors at a faster rate than mice left untreated