The latest Ebola outbreak may have started with someone infected years ago
Rather than jumping from animals, the virus may have laid low in a person, then spread
![man receiving an Ebola vaccination in Guinea](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2021/03/031221_eg-jl_ebola_feat.jpg?fit=1030%2C580&ssl=1)
The most recent Ebola outbreak in Guinea was sparked by someone who got infected at least five years ago during the 2013–2016 outbreak, a new study suggests. In the wake of new cases, Guinean health officials launched an Ebola vaccination campaign (shown).
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