In an effort to combat the deadly Ebola outbreak, scientists and authorities are aiming to roll out vaccines, raising questions of ethics.
A new map has shown that more regions in Africa are at risk of animal-related Ebola infections than previously feared.
The World Health Organisation has classified air pollution as carcinogenic to humans.
The world's first clinical trial designed to explore using a hallucinogen from magic mushrooms to treat people with depression has stalled.
Genetic sequence data on a strain of bird flu has shown the virus has acquired mutations that might make it more likely to cause a human pandemic.
Europe is experiencing its first sustained transmission of dengue fever since the 1920s, with more than 1 300 people infected in Madeira, Portugal.
A Qatari man struck down with a previously unknown virus related to the deadly Sars infection is critically ill in hospital in Britain.
Science shows music has a profound effect on an athlete before and during a major sports event.
Most of Africa's languages don't have a word for cancer. How can a continent hope to treat, let alone fight, a disease that has no name?
Studies into a chemical involved in the brain's sensory and reward systems could help in the development of drugs to treat gambling addicts.