Scientists reported Wednesday more evidence that a certain antidepressant may cut the development of brain plaque implicated in Alzheimer's disease, this time by studying young people without dementia.

The antidepressant citalopram lowered by 37 percent the amount of amyloid beta, the main ingredient in brain plaques, in a selection of 23 healthy adults aged 18-50.

More rigorous screening with low dose CT scans could catch tens of thousands of U.S. lung cancer cases in the next five years, but at a price tag of $9.3 billion, researchers said Wednesday.

The forecast made by experts at the Fred Hutchinson Cancer Research Center in Seattle, Washington, was based on U.S. government recommendations for more CT scans rather than X-rays, particularly for people who have smoked for many years.

Some scientific research has suggested that being obese may have a preventive effect against breast cancer in young women, but a study out Wednesday found the opposite

Some scientific research has suggested that being obese may have a preventive effect against breast cancer in young women, but a study out Wednesday found the opposite.

Melbourne is pushing to become one of the first cities in the world to introduce a total ban on smoking in public spaces, officials said Thursday, with anyone wanting a cigarette required to use a designated shelter.

Melbourne city councillor Richard Foster said there was overwhelming support to extend smoke-free areas following a test in The Causeway, one of the bustling streets of Australia's second biggest city.

Two healthcare workers at a Florida hospital that is caring for a Saudi patient with the dangerous MERS virus have tested negative for the illness, the hospital said Wednesday.

The two were "showing symptoms," Dr. P. Phillips Hospital in Orlando said on Tuesday. One was hospitalized and the other was treated and discharged.

Saudi Arabia announced Wednesday five new deaths from MERS, raising the death toll in the country worst-hit by the mysterious coronavirus to 157 since it appeared in 2012.

The health ministry also reported 16 new infections with Middle East Respiratory Syndrome raising the total so far to 511.

The U.N. health agency Wednesday warned countries to bolster their guard against the MERS virus, which has killed 152 people in Saudi Arabia and is causing alarm as it spreads elsewhere.

The World Health Organization said its emergency committee, which includes global medical and policy experts, had flagged mounting concerns about the potentially fatal Middle East Respiratory Virus (MERS).

Will locusts feed the world?

The voracious flying insect, capable of swarming in millions and stripping fields of crops, has long been associated with hunger.

Depression is the top global cause of illness and disability for adolescents, with suicide the third-biggest cause of death, the World Health Organization said on Wednesday.

The finding is in a new report by the U.N. agency, which has pulled together a wealth of published evidence with direct consultations with 10 to 19-year-olds around the world to assess the health issues that affect them.

A third potential case of the dangerous Middle East Respiratory Virus (MERS), has been found in the United States, health authorities said Tuesday.

"Two of the 20 team members exposed to the confirmed MERS patient are showing symptoms," said Geo Morales, spokesman for the Orlando hospital where one infected patient was treated.