Filoviridae is a family of viruses known for causing severe hemorrhagic fevers in humans and animals. The most well-known members of this family are the Ebola virus and the Marburg virus. These viruses are typically transmitted through direct contact with infected bodily fluids and can lead to high mortality rates. Filoviridae viruses are characterized by their filamentous shape and are classified as negative-sense single-stranded RNA viruses. They replicate within the host's cells, leading to significant immune response and tissue damage. Understanding these viruses is crucial for developing effective treatments and vaccines to combat outbreaks.