Exercise may do more than keep a healthy brain fit: New research suggests working up a good sweat may also offer some help once memory starts to slide— and even improve life for people with Alzheimer's.

The effects were modest, but a series of studies reported Thursday found vigorous workouts by people with mild memory impairment decreased levels of a warped protein linked to risk of later Alzheimer's — and improved quality of life for people who already were in early stages of the disease.

European regulators on Friday gave the go-ahead for the world's most advanced malaria candidate vaccine, despite mixed results from a years-long trial on nearly 15,500 children in seven African countries.

The London-based European Medicines Agency (EMA) said in a statement it had adopted "a positive scientific opinion for Mosquirix... for use outside the European Union". The drug is also known as RTS,S.

The U.S. military shipped live anthrax samples to dozens of facilities in the country and to seven other nations over the past decade, a government report found Thursday, blaming faulty specimen killing and poor testing.

In all, 86 labs have received live anthrax specimens since 2005, the report said, following up on an embarrassing mistake for the military.

Two inexpensive classes of drugs available in generic form each reduce the recurrence of breast cancer in post-menopausal women as well as death rates from the disease, a pair of studies reported Friday.

Taking the medications together may further boost anti-cancer benefits and help cancel out undesirable side-effects of one of the drugs, according to the research published in medical journal The Lancet.

A 560-pound (254-kilogram) man biking across the United States to lose weight hit a snag in Rhode Island.

The Newport Daily News reports (http://bit.ly/1JfwEFz ) a bent rim on Eric Hites' bicycle has kept him in Tiverton since late last week, 90 miles (145 kilometers) from where his ride began in Falmouth, Massachusetts.

Portugal on Wednesday tightened its abortion laws, adopting a bill aimed at making women pay to end a pregnancy and requirements for more stringent tests before the procedure.

The governing center-right coalition backed the move to introduce fees during a final, heated session of parliament that prompted jeers from opposition lawmakers.

A partially sighted British pensioner has had most of his vision restored thanks to a "bionic eye" -- a device that converts video images from a miniature camera installed in his glasses to his brain.

The University of Manchester announced the success of the operation on retired engineer Ray Flynn in a statement on Wednesday, saying it was a world first for the 80-year-old's particular condition.

A cure for HIV remains elusive, but scientists say the hunt is more hopeful than ever, based on the prospects of new research described at the International AIDS Society conference this week.

Scientists reported on progress on gene therapy and using antibodies to neutralize HIV, research into why some HIV-infected people are able to stay in remission off drugs after treatment, and a hypothesis that vaccines, yet to be invented, could be used to "shock and kill" the virus in HIV-infected people.

Six new wheelchairs are lined up near the entrance of the Beautiful Gate Handicapped People's Centre in the central Nigerian city of Jos.

The chairs' new owners -- all of them polio survivors -- crawl one by one to the three-wheeled machines with flip-flops on their hands, dragging atrophied, twisted legs and feet behind them.

New research suggests poor sleep may increase people's risk of Alzheimer's disease, by spurring a brain-clogging gunk that in turn further interrupts shut-eye.

Disrupted sleep may be one of the missing pieces in explaining how a hallmark of Alzheimer's, a sticky protein called beta-amyloid, starts its damage long before people have trouble with memory, researchers reported Monday at the Alzheimer's Association International Conference.