The medical charity Medecins Sans Frontieres said Liberia was declared free from Ebola on Saturday after 42 days without a new case.A large of people have died from Ebola in Liberia, neighboring Guinea and Sierra Leone since the outbreak began in December 2013, according to the World Health Organization (WHO).Nearly half of those deaths have been in Liberia, where the outbreak peaked between August and October, with hundreds of cases a week, sparking international alarm.MSF said that Liberia’s completion of the WHO’s benchmark for the end of an Ebola epidemic – 42 days without a new case, marking twice the maximum incubation period of the virus – should not lead to complacency.However vigilance is urged until the worst-ever recorded outbreak of the virus is extinguished in neighboring Guinea and Sierra Leone.According to the WHO, a total of 868 health workers have caught the virus in Guinea, Liberia, and Sierra Leone since the start of the outbreak, of whom 507 died.Reuters