Liberia Is Ebola Free (Again)

For the second time this year, Liberia has stamped out Ebola transmission and been declared free of the disease, health officials say. Today (Sept. 3) marks 42 days since the last person to have Ebola in Liberia was cured and released from the hospital, according to a new report from the Centers for Disease Control and Prevention (CDC). Health officials typically wait 42 days to declare a country Ebola-free, because this is twice as long as the 21-day incubation period of the virus (the time it