Which disease is characterized by its transmission through blood and body fluids, and originates in Africa?

Ebola is characterized by its transmission through blood and body fluids, and it indeed has its origins in Africa. The disease is caused by the Ebola virus, which can be spread through direct contact with bodily fluids of infected individuals, including saliva, sweat, blood, and other secretions. This mode of transmission emphasizes the importance of safety protocols in healthcare settings and during outbreaks, as fluids can be contagious even after a person has died from the disease.

While malaria, HIV/AIDS, and yellow fever are also serious diseases associated with transmission and have roots within or connections to Africa, they differ in key aspects. Malaria is primarily transmitted through the bites of infected mosquitoes rather than bodily fluids. HIV/AIDS can be transmitted through body fluids similar to Ebola but does not have the same acute viral hemorrhagic fever presentation. Yellow fever is an arboviral disease transmitted by mosquitoes, not through direct contact with infected fluids. Thus, the unique characteristics of Ebola regarding its specific transmission and origin make it the correct answer.