WHO

WHO claims quarter of all global deaths of children under five caused by filthy environment.

Survey shows world spends $1.4tn a year on healthcare for smoking-related illnesses.

Humanitarian bodies are calling for immediate resumption of evacuation of the stranded refugees.

A lack of doctors, medicine and other essentials is causing great hardship to Yemen, UN warns.

A nurse who treated the man has also been infected and is in an intensive care unit in Madrid.

Researchers focused on 'falsified or degraded antibiotics' like ciprofloxacin or ceftriaxone, which WHO considers 'essential'

World Health Organisation says 600 million people around the world are obese.

Hepatitis is a term used to describe the inflammation of the liver from viral infection or toxic substances.

WHO experts say there is no need to cancel or postpone the Rio Olympics due to the Zika virus outbreak.

The decision to declassify is seen as a move to put pressure on the World Health Organisation.

Novak Djokovic won the Bronze medal at the 2008 Beijing Olympic Games

Risks of a zika outbreak in Europe this summer are low or moderate, with significant differences across regions.

Report shows many countries yet to ban aggressive marketing of breast milk substitutes.

World Health Organization says pollution is increasing and billions worldwide are exposed to dangerous air.

Two academics say World Health Organization needs to tackle yellow fever outbreak as matter of urgency.

Tesla's Bioweapon Defence Mode cleanses polluted air outside the car as well.

Darpa has launched a programme that aims to create vaccines that can adapt to fight constantly changing viruses.

WHO estimates that about 422 million people live with diabetes – a figure that has almost quadrupled since 1980.

The Liberian health ministry has insisted it is prepared to contain any new flare-up

Guinea records fresh cases of Ebola, but WHO says epidemic is unlikely.

MBT has been found to raise the risk of cancer in animals, with WHO stating there is a strong possibility it is also harmful to people.

Fifteen companies have potential vaccines, according to the World Health Organization.

Zika virus: WHO cautions against linking virus with deadly Guillain-Barré syndrome.

WHO also said the microcephaly-causing disease could have potentially devastating effects for families.

On-screen smoking accounts for 37% of all new adolescent smokers.

Zika 'constitutes a public health emergency of international concern' said WHO chief Dr Margaret Chan.

Two cases have emerged raising questions about possible transmission through sex.

"It would be unconscionable if a lack of preparedness resulted in congenital abnormalities in newborns."

More than 100 people who came in contact with the victims are currently being assessed.

Only one in eight people live in cities that meet WHO air pollution standards.