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An expert at the World Health Organization says time is running out for German investigators to find the source of the world's deadliest E. coli outbreak, which has spread fear across Europe and cost farmers millions in exports.

The World Health Organization said Thursday that the E. coli bacteria responsible for a deadly outbreak that has left 18 dead and sickened hundreds in Europe is a new strain that has never been seen before....

Using a mobile phone may increase the risk of certain types of brain cancer in humans and consumers should consider ways of reducing their exposure, World Health Organization (WHO) cancer experts said on Tuesday.

Noise is dangerous and excessive noise is potentially deadly, according to a new report on the health effects of noise by the World Health Organization and the European Commission’s Joint Research Center.

An expert panel commissioned by the World Health Organization to investigate its handling of the swine flu pandemic has slammed mistakes made by the U.N. body and warned tens of millions could die if there is a severe flu outbreak in the future....

The H1N1 pandemic is over and the global outbreak turned out to be much less severe than was feared just over a year ago, the head of the World Health Organization (WHO) said on Tuesday.

Experts who studied almost 13,000 cell phone users over 10 years, hoping to find out whether the mobile devices cause brain tumors, said on Sunday their research gave no clear answer.

Flu experts convened Tuesday to assess whether the H1N1 pandemic has peaked, the World Health Organization (WHO) said.

The H1N1 flu pandemic appears to be easing, but a third wave of infections could yet strike, the World Health Organization (WHO) said on Monday.

Tobacco use kills at least 5 million people every year, a figure that could rise if countries don't take stronger measures to ...