With the potential for more than 1 million people to contract Ebola, every second, and every bit of help counts. Tara explains what's currently being done with U.S. aid. Is it enough?
There have been other Ebola outbreaks, and while containing them is never easy, sometimes conditions on the ground augur for a better outcome. Trace explains why the current outbreak in West Africa is so tough to slow down.
Many potential drug cures remain in the laboratory -- and one treatment won't fit all.
A survivor's blood would be needed to create a treatment for the deadly virus, reports say.
As West African nations handle an outbreak of the deadly Ebola virus, Trace takes a look at preparedness in other nations and assesses the chances of the illness going terrifyingly global.
The California children tested negative for polio, and all had been vaccinated.
A new study shows how regional climate differences controlled the intensity of outbreaks of plague in China.
The recent outbreak of mass hysteria at a school in Upstate New York is not that unique.