A person who survived the major Ebola outbreak in West Africa between 2014 and 2016 may have harbored the virus for five years before it hopped to another person and triggered the current outbreak in Guinea, according to a new analysis.

Scientists previously knew that the Ebola virus could hide out in the bodies of survivors, especially in “privileged” areas of the body where the immune system is less active, such as in the eyeballs or the testes, Live Science previously reported. That means that the person could shed the virus for some time after recovering from the deadly infection; and in rare occasions, that person could transmit it to others. The longest a person has been known to shed the Ebola virus was 500 days, according to STAT News