The coronavirus that emerged in China has infected thousands of people and triggered alarm around the world. Here's what we know about it.
The WHO rejected a call for the Rio Olympic Games to be moved or postponed due to the threat posed by the Zika virus in Brazil.
Lawmakers call for British trials of genetically modified insects
Scientists studying people with depression say brain scans could be used to predict who may relapse
But in some countries, including South Africa, Paraguay, and Belarus, healthy life expectancy has dropped.
Researchers found that blocking a specific enzyme made mice cleverer and at the same time less fearful.
Food shortages on a scale likely to occur once a century under past conditions may in future hit as often as once every 30 years, experts warn.
People caught up in a nuclear disaster are more likely to suffer severe psychological disorders, scientists have found.
Experts called for the creation of a $2-billion vaccine development fund to feed a pipeline of potential new shots against priority killer diseases.
Even before it wins a licence, the world's first malaria vaccine has lost some of its sheen.
The Phase II trials are designed primarily to test the vaccines' safety, but will also assess whether they provoke an immune response.
Scientists say they have developed a way of genetically modifying and controlling an invasive species of moth that causes serious pest damage to crops.
An oral vaccine has reduced cases of severe cholera by nearly 40 percent in a key trial in Bangladeshi slums.
Experts called for urgent changes to the World Health Organisation after an inadequate response to the deadly Ebola outbreak.
The global HIV epidemic could see a resurgence in just five years without a drastic acceleration in efforts to prevent the virus, says the UN.
The insecticide lindane has been specifically linked to non-Hodgkin lymphoma, says the World Health Organisation.
Controlling the South Korean outbreak will require a level of openness that Saudi Arabia has only now begun to adopt.
New research is one of the most comprehensive sets of genetic data on a human infectious agent and paints a worrying scene.
First results from a human trial of an Ebola vaccine show it generates an immune response, scientists say.
Drug-resistant superbugs could cost up to $100-trillion by 2050 if their rampant global spread is not halted, according to a review.
Scientists have made the most comprehensive map yet of African genetic variation, which could help them learn more about the role genes play in diseases.
Despite major advances in treating and preventing HIV, Europe and Central Asia have failed to tackle the epidemic, say health officials.
Scientists have found that graphene, the world's thinnest and strongest material, can allow protons to pass through it.
Flu is a notoriously tricky virus to beat, since there are so many different strains circulating at any one time.
More and more infections in Europe are proving able to evade even the most powerful, last-resort antibiotics, say health officials.