Malaria is on the march to higher elevations as temperatures warm due to climate change, a trend that could increase the number of people sickened by the disease, researchers said Thursday.

The study in the U.S. journal Science was based on records from highland regions of Ethiopia and Colombia, raising concern about a potential spike in cases of the the mosquito-borne disease, which killed some 627,000 people in 2012.

A British woman won a High Court battle on Thursday to preserve her late husband's sperm for at least another decade so that she can bear his children.

Beth Warren, 28, had challenged a ruling by fertility regulators that the sperm stored by her husband Warren Brewer before his death in 2012 should be destroyed next year.

Saudi health authorities said Thursday a man has died from the MERS coronavirus, bringing the death toll from the respiratory disease in the worst-hit country to 62.

The 55-year-old national, who died in Riyadh from the Middle East Respiratory Syndrome, was suffering from "chronic illness," the health ministry website said.

Deaths from Alzheimer's disease are under-reported in the United States and the most common form of dementia may be taking as many lives as heart disease or cancer, said a study Wednesday.

Alzheimer's disease currently ranks sixth among causes of death in the United States, according to the Centers for Disease Control and Prevention. Heart disease is first, and cancer second.

A new gene therapy approach that engineers a person's T cells so that they become resistant to the human immunodeficiency virus has shown early signs of success, researchers said Wednesday.

Also called gene editing, the process acts like molecular scissors to snip off an entry portal for HIV so the virus cannot enter these key immune cells.

A baby treated for HIV within hours of birth is free of the virus nearly a year later, in the second case that has raised hopes about early treatment, doctors said Wednesday.

The approach mirrored that taken for a Mississippi baby, who has been off treatment for 21 months and still has no detectable virus in her system.

U.S. lawmakers who support steady relaxation of state laws on marijuana sparred with Obama administration officials who continue to label the drug in the same high-danger category as heroin.

The Drug Enforcement Administration's chief deputy said marijuana deserved to remain listed as a "Schedule 1" narcotic -- a list which includes severely addictive drugs including LSD and ecstasy -- even though he could not identify a single fatal overdose attributable to cannabis last year.

Hong Kong confirmed Tuesday a new human case of the deadly H7N9 avian flu found in an 18-month-old girl, the sixth case to be discovered in the city.

Fears over avian flu have grown following the deaths of three men from the H7N9 strain in Hong Kong since December last year, all of whom had recently returned from mainland China.

Exciting research suggests that a shot every one to three months may someday give an alternative to the daily pills that some people take now to cut their risk of getting HIV.

The experimental drug has only been tested for prevention in monkeys, but it completely protected them from infection in two studies reported at an AIDS conference on Tuesday.

It was banned in restaurants and al fresco eating became all the rage. It was banned in offices, and business started getting done in huddles on the sidewalk.

The French, legend had it, were more likely to give up having affairs than stub out their smoking habit.