Around 30 such diseases have emerged during the past two decades or so notably Hanta virus and Ebola fever.

ECONOMIST: Some early lessons and legacies of SARS

And now comes an outbreak of the deadly Ebola virus, the contagious and incurable fever that makes its victims bleed to death through their ears, nose, throat, everywhere.

ECONOMIST: Uganda

Uganda's Ministry of Health declared the outbreak in Kibaale district Saturday after getting confirmatory results from the Uganda Virus Research Institute identifying the disease as Ebola hemorrhagic fever, Sudan strain.

CNN: STORY HIGHLIGHTS