Called ALSV, the virus causes headache and fever and was found in Inner Mongolia. Scientists say the discovery illustrates how much we still don't know about ticks.
Last fall, Merck said it would stop selling its rotavirus vaccine to West Africa and redirect its supply to China at a higher price. After NPR broke the story, the situation changed — for the good.
The modified fungus produces spider toxin that rapidly kills mosquitoes, raising hopes for a new weapon to fight a disease that sickens millions. But not everyone is convinced.
'The Hot Zone,' a miniseries on the National Geographic Channel, was "inspired" by a 1989 Ebola crisis in the U.S. We asked virologist Thomas Geisbert, who was on the scene.
Efforts to stop the Ebola outbreak in the Democratic Republic of the Congo face a daunting obstacle: A multitude of local and national players are using the disease as a weapon in their struggle for power.
As health workers in the Philippines continue to try to contain the outbreak, a botched vaccination campaign against dengue is making their job harder.
The goal is to raise money to fight child poverty by selling red foam noses and staging celebrity events. But some critics are raising questions about the campaign.
In late April, a tragedy began to unfold in Larkana. First one, then 15, now hundreds of youngsters have been found to be HIV positive. Who is responsible?
The Philippines is now dealing with one of the worst measles outbreaks in the world. Since January, the country has had more than 33,000 cases. More than 450 people have died.