There has been 7 Ebola outbreaks over the past few decades. I am not sure if anyone can answer this but where does the Ebola virus hide between outbreaks? Perhaps Hawaii Islander knows the answer. Just curious here.
Ebola resides in animal hosts. The exact extent of animal hosts that can transmit the virus to humans is not known. It is thought that fruit bats and primates are the primary source of animal to human transmission. It is likely that handling of contaminated animals during food preparation is one source of infection. The virus has been isolated from other animals (mammals), but no known transmission from those sources have occurred. CDC, CIDRAP (actual site, not editorials), NIH, and WHO are good sources of more detailed information. The latest infectious disease or medical microbiology textbook or virology textbook can also be a good place to get information.