Britain could become the first country in the world to allow the creation of babies with DNA from three parents on Tuesday in a move that has divided Britons and pitted campaigners against religious leaders.

Lawmakers in parliament are set to vote on mitochondrial DNA donation techniques for in-vitro fertilization (IVF) aimed at preventing serious inherited diseases being passed on from mother to son.

The British city of Bristol has become the country's first to test smoke-free zones in outdoor public places, without imposing an outright ban, officials said Monday.

The southwestern English city, named Europe's Green Capital for 2015, is running a pilot scheme in two squares.

Vigorous exercise such as fast running might be harmful to your health over time, according to a Danish study Monday that found light jogging is best for longevity.

People who did not jog at all were just as likely to die as people who jogged strenuously and often, according to the 12-year study in the Journal of the American College of Cardiology.

Tests have confirmed an outbreak of avian flu in chickens at a farm in southern England but officials described it as a "low severity" strain of the disease on Monday.

Britain's Department for Environment, Food and Rural Affairs (Defra) said there was no link with a separate outbreak of bird flu detected at a duck breeding farm in November.

Parents have long suspected it, but now doctors have proof: the more time teenagers spend on computers or mobile phones, the less they sleep -- especially if the gadget is used just before bedtime.

The evidence is so strong, the experts said, that health watchdogs should overhaul guidelines for electronic device use by youngsters.

The first large-scale trials of two Ebola vaccines were due to begin in Liberia on Monday, the partnership conducting the research said.

The vaccines contain harmless fragments of the virus that trigger an immune response, according to the Partnership for Research on Ebola Vaccines in Liberia (PREVAIL), a collaboration between the United States and Liberia.

Many packaged meals and snacks for toddlers contain worrisome amounts of salt and sugar, potentially creating an early taste for foods that may contribute to obesity and other health risks, according to a new government study.

About seven in 10 toddler dinners studied contained too much salt, and most cereal bars, breakfast pastries and snacks for infants and toddlers contained extra sugars, according to the study by researchers at the federal Centers for Disease Control and Prevention. They advise parents to read food labels carefully and select healthier choices.

As Africa's leaders meet in Ethiopia to discuss the Ebola crisis, expectations of firm action will be tempered by criticism over the continent's poor record in the early stages of the epidemic.

The outbreak is a priority on the agenda of the 54-nation African Union (AU) summit in Addis Ababa on Saturday, yet the bloc is still smarting from criticism that it reacted too slowly to the outbreak.

Embattled milk producers in the U.S. launched a social media campaign this week to rebuild public confidence in the health benefits of their product.

But how healthy is it?

The husband of a Canadian who was diagnosed earlier this week with bird flu after returning from a trip to China has also tested positive for the virus, health officials said Friday.

The couple in their 50s began feeling sick days after returning home in westernmost British Columbia province.