As plague claims more lives, authorities scramble to kill infected fleas in the poorest neighborhoods.
A doctor who recently returned to New York from treating Ebola patients in Guinea tests positive for the deadly virus.
A look at why one Ebola outbreak was contained, while the other spiraled out of control.
Even in the face of a disease like Ebola, people value freedom and convenience over the public good.
A Texas Department of State Health Services insists that authorities were working with extreme diligence to prevent further spread.
A health care worker who treated Thomas Eric Duncan, the man who died of Ebola, has tested positive for the disease.
The man's condition is declining as officials monitor people he has come in contact with for signs of the Ebola virus.
Colonial rule in Africa, urban growth, railway travel, unsterilized needles and other factors all helped create the perfect storm leading to the HIV/AIDS pandemic.
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