E-cigarettes should be subject to the same regulations as cigarettes and should not be sold to minors, the American Heart Association (AHA) said in new policy guidelines out Monday.

The use of e-cigarettes, which are electrical devices that heat flavored nicotine liquid into a vapor that is inhaled, much like traditional cigarettes but without the smoke, has been rising rapidly among youths in recent years, raising concerns about the potential for addiction risks and health damage.

Tokyo stands ready to offer an experimental drug developed by a Japanese company to help stem the global tide of the deadly Ebola virus, the top government spokesman said Monday.

"Our country is prepared to provide the yet-to-be approved drug in cooperation with the manufacturer if the WHO requests," Chief Cabinet Secretary Yoshihide Suga.

The World Health Organization on Sunday announced the first Ebola infection among its experts, describing the infected person as an epidemiologist who had been deployed to Sierra Leone.

The WHO did not provide information about the sex, age or nationality of the person but said the patient was "receiving the best care possible."

The United Nations vowed Saturday to play a "strong role" in helping Liberia and its neighbors fight the deadly outbreak of Ebola in west Africa, which it said could take months to bring it under control.

Liberia has been particularly hard hit by the epidemic that has swept relentlessly across the region since March, accounting for almost half of the 1,427 deaths.

Is there a limit to how old humans could one day become?

French researchers trying to answer the age-old question said they found evidence in two categories of people who lived long lives of a "biological barrier" to living forever.

The death toll from the Ebola outbreak sweeping through west African countries has risen to 1,427 out of more than 2,600 cases, the World Health Organization said Friday.

The latest tally, which counts the number of victims from March when the deadly disease first reared its head to August 20, found that 77 people had succumbed to the virus on Tuesday and Wednesday. The previous death toll was 1,350.

Every region of Liberia has now been hit by Ebola, officials said Friday, as the World Health Organization warned the fight against the worst-ever outbreak of the killer disease would take months.

After seeing people fall to the deadly virus in area after area, Liberia said two people had succumbed to the virus in Sinoe province, the last Ebola-free bastion in a country that has seen the biggest toll with 624 deaths.

People with autism have too many synapses -- the connectors by which brain cells send and receive signals -- according to a new study that may point to a treatment for the complex disorder.

The extra synapses in autistic brains are the result not of overproduction, but of a failure in the normal process of discarding old and degraded cells.

Sao Paulo is thirsty.

A severe drought is hitting Brazil's largest city and thriving economic capital with no end in sight, threatening the municipal water supply to millions of people.

Women who eat instant noodles, like Ramen, at least two times a week face a greater risk of high blood pressure, elevated blood sugar and high cholesterol, U.S. researchers said Thursday.

The study looked at data from 10,711 adults -- just over half of whom were women -- in the Korean National Health and Nutrition Examination Survey.