Monrovia: The people of Monrovia's Peace Island ghetto, refugees of civil war who found themselves suddenly overwhelmed and outmanoeuvred by the deadly Ebola epidemic, are used to life under siege.

Yet with Liberia emerging from the worst outbreak in history a year to the day since Ebola was first identified in west Africa, the slum-dwellers of Liberia's capital city are facing an even deadlier threat - the measles virus.

In this file photo, a child covers his face as he looks at a man suspected of suffering from the Ebola virus. Experts say a new measles outbreak could be more deadly. Credit:Abbas Dulleh/AP

Experts say Liberia and its neighbours Guinea and Sierra Leone are ripe for an outbreak that could infect hundreds of thousands, dwarfing the carnage wrought by Ebola.

Death once again stalks impoverished communities like Peace Island, a cramped spit of land surrounded by swamp where 30,000 people sought refuge behind the abandoned Ministry of Defence after Liberia's 1989-2003 civil wars.