Entirely possible. New cases have surfaced because the virus endures in the semen of those who have recovered, long after they are 'well' (60+ days).
We are forced to rely on such statistics as are made available, too, and with aid funding and supplies declining, there remains strong economic incentive to be proclaimed Ebola-free.
Many people may be in the bush who have not been reported as having Ebola. We may not know the true statistics of this disease. Who knows whether it has been cured or if the disease is changing to some other form. A new form of Ebola may start the scare all over again.