What are the effects of filoviruses on the human body?

Hemorrhagic fever: Good question. Filoviruses are a group of viruses, some of them can cause hemorrhagic fever in primates and humans, examples are the genus Ebolavirus which has several species causing Ebola, & the Marburgvirus genus (rarer), with only two species of concern. For a good discussion of the subject see: https://en.wikipedia.org/wiki/Filoviridae with links to both Ebola and Marburg types.