A Liberian doctor who was infected with Ebola has died after being given the experimental drug, ZMapp.
Ebola has left more than 1,400 people dead across West Africa, underscoring the urgency for developing potential ways to stop and treat the disease.
However, health experts warn these drugs and vaccines have not undergone the rigorous testing that usually takes place before they are used.
Americans Keith Brantly and Nancy Writebol received ZMapp and recovered but a Spanish priest, Miguel Pajares died after treatment.
Asked about the drug being offered from Japan, Liberian Information Minister Lewis Brown said, “Although we will continue to emphasize prevention, we remain open to all available curative opportunities.”