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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

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).

CAROL VALADE/AFP via Getty Images

By Erin Garcia de Jesús and Jonathan Lambert

- More than 2 years ago

The ongoing Ebola outbreak in Guinea was most likely sparked by someone infected during the outbreak seven years ago, a new study shows.