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The U.S. Centers for Disease Control and Prevention establishes three research stations in Sierra Leone.

1976

GLSO
RSCH
EPD
WAR

The research centers are created to study the Lassa fever virus, a viral hemorrhagic fever similar to Ebola.

The U.S. will pull out of Lassa fever research in 1993, handing control over to the relief organization Medical Emergency Relief International (Merlin) after civil war breaks out in Sierra Leone in 1991.