AIDS
Most researchers believe that HIV originated in sub-Saharan Africa during the twentieth century. HIV is now a pandemic, with an estimated 38.6 million people currently infected by the disease around the world . The Joint United Nations Program on HIV / AIDS (UNAIDS) and World Health Organization (WHO) estimate that AIDS has killed more than 25 million people since it was first recognized the June 5 1981, becoming one of the most destructive epidemics in history.
Ebola
Several highly lethal virus pathogens are members of the family Filoviridae. These are filamentous viruses that cause viral haemorrhagic fever, including Ebola virus and Marburg virus. The Marburg virus attracted the attention of the press in April 2005 by an outbreak in Angola. The outbreak began in October 2004 and continued in 2005 and was the worst epidemic of any kind of viral hemorrhagic fever.
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