Ebola is not a respiratory virus; it requires direct fluid contact

Science · Published 25 October 2026 Swipe more like this →

In short: Unlike the flu or COVID-19, you cannot catch Ebola simply by being near an infected person. It is a severe hemorrhagic fever that demands specific types of physical interaction to spread, moving from wild hosts into human populations through direct contact with contaminated body fluids.

Ebola disease is caused by viruses in the Orthoebolavirus genus of the filoviridae family. While there are six identified species of Orthoebolaviruses, three are known to cause large outbreaks in humans: Ebola virus (EBOV), Sudan virus (SUDV), and Bundibugyo virus (BDBV). The disease was first recognized in 1976 during two simultaneous outbreaks—one involving the Sudan virus in South Sudan and another involving the Ebola virus in Yambuku, Democratic Republic of the Congo.

The transmission mechanism is highly specific. It is thought that fruit bats of the Pteropodidae family serve as natural hosts. For humans, the virus spreads through direct contact with infected body fluids—including blood, saliva, vomit, feces, and semen—from an infected person or animal. Notably, a person only becomes contagious once they begin showing symptoms. Because it is not airborne, the risk to the general public remains low unless specific infection control measures are bypassed.

Clinical progression typically begins with 'dry' symptoms like fever and fatigue within 2 to 21 days of exposure (averaging 8 to 10 days). As the illness advances, it transitions to 'wet' symptoms, including severe diarrhea, vomiting, and unexplained bleeding from the eyes, nose, or gums. While the average case fatality rate is around 50%, historical outbreaks have seen mortality rates as high as 90%. Currently, approved vaccines and treatments exist only for the Ebola virus species, while others remain under development.

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