Doctors in India smuggled a desperately ill patient across state borders under cover of darkness to receive a liver transplant after police said violent protests would make a journey by ambulance too dangerous.

E-cigarettes may have helped some 18,000 smokers in England kick the tobacco habit last year, according to research released Wednesday.

Scientists said Monday they had found a suitable animal model for testing new Zika drugs -- a monkey whose offspring suffers brain damage similar to human fetuses exposed to the virus.

While the world awaits a Zika vaccine, the first ever injection against dengue fever is spreading, with Mexico becoming next week the latest country where people can get the shot.

French pharmaceutical giant Sanofi is presenting its Dengvaxia vaccine to doctors at an event in eastern Mexico on Saturday, while people aged nine to 45 will be able to get the shot from their physicians from Monday.

The world's first face transplant recipient, Frenchwoman Isabelle Dinoire, died of a cancer unrelated to medicine she was taking to stop her body rejecting the graft, doctors said Wednesday.

Maimed by her dog, Dinoire received part of a brain-dead person's face in a historic operation in 2005, aged 38. 

U.S. chain Pizza Hut's Indonesian operation insisted its restaurants were safe Tuesday after it was accused of using ingredients up to six months past their expiry date.

At least 2.6 billion people, over a third of the global population, live in parts of Africa, Asia and the Pacific where Zika could gain a new foothold, researchers warned Friday, with 1.2 billion at risk in India alone.

These are people who reside in as-yet unaffected parts of the world with the right climate and abundant mosquitoes for the virus to settle, spread and propagate an epidemic like the one besetting the Americas and Caribbean, they said.

Run-down roads, reckless driving and poor vehicle maintenance are all being blamed for a spike in deadly traffic accidents in Tunisia that has safety experts worried.

At least 16 people were killed and 85 injured on Wednesday when a lorry's brakes failed and it crashed into a bus in the center of the country.

Singapore urged all pregnant women showing symptoms of fever or rashes to have themselves tested for the Zika virus Wednesday after the number of cases in the city-state soared to 82.

The United States and Britain joined Australia and Taiwan in advising pregnant women to avoid non-essential travel to the city-state.

Singapore clinics Monday reported more Zika infections, bringing the suspected total to 50, as mosquito-fighting teams saturated the scene of the outbreak.