Workers in Chile began harvesting the country's first medical marijuana crop Tuesday, breaking new ground in cancer treatment in a nation where cannabis is outlawed as a hard drug.

With the blessing of local authorities, the Daya Foundation, a charitable group, began harvesting some 400 plants sown last October under a special permit to extract cannabis oil to be given free of charge to 200 cancer patients as pain treatment.

Sierra Leone said on Tuesday it had wrongly reported Ebola as the cause of a baby's death in a part of west African country which had been declared free of the virus weeks ago.

Villagers in the eastern district of Kailahun were dismayed when the government said on Monday a nine-month-old boy had tested positive after his death, more then three months after the last confirmed Ebola case.  

Trying to slim down? Weight Watchers and Jenny Craig scored the best marks for effectiveness in a review of research on commercial diet programs, but many other plans just haven't been studied enough to evaluate long-term results.

The two plans are among the most popular and had the best evidence that dieters could lose meaningful amounts of weight and keep it off for at least a year, the review authors said.

Vigorous exercise, the kind that makes you sweat, get red in the face and breathe hard, may be better than moderate exercise when it comes to living longer, researchers said Monday.

According to a study by Australian researchers based on more than 200,000 adults over age 45, and is published in the Journal of the American Medical Association (JAMA) Internal Medicine.

A hospital operator denied allegations of poor training and improper preparation in seeking dismissal of a lawsuit by a nurse who contracted Ebola while caring for the first U.S. patient to succumb to the deadly disease.

Texas Health Resources filed a response Friday to the March 2 lawsuit by nurse Nina Pham, The Dallas Morning News reported Saturday (http://bit.ly/1GcgoEy ).

A man who in August became the second person in France to receive a much-hyped new-generation artificial heart said in his first interview Sunday he had "recovered", to the point of going on bike rides.

The 69-year-old man, who wishes to remain anonymous, was terminally ill with a heart condition when he received the transplant exactly eight months ago in the western city of Nantes.

Five people have died in Jordan since the beginning of the year from swine flu, the health ministry said Sunday, adding that it has recorded 130 cases of the virus.

"The health ministry has this year registered five deaths from the H1N1 virus and 30 cases," a senior ministry official told a news conference.

Five people have died in Jordan since the beginning of the year from swine flu, the health ministry said Sunday, adding that it has recorded 130 cases of the virus.

"The health ministry has this year registered five deaths from the H1N1 virus and 30 cases," a senior ministry official told a news conference.

American pharmaceutical giant Pfizer has stopped selling one of its lucrative vaccines for children in China, the company said.

Pfizer gave no explanation for stopping its sales of the Prevnar vaccine, which helps prevent infections such as pneumonia, which killed an estimated 935,000 children under the age of five globally in 2013, according to the World Health Organization.

A campaigner who raised awareness of the rare genetic condition progeria, which causes those affected to age about eight times faster than average, has died at age 17.

The U.S.-based Progeria Research Foundation said Hayley Okines, from East Sussex in England, died Thursday at her home. It didn't provide more details.