Liberia received the experimental Ebola drug ZMapp from the US last week and started administering it to infected patients. Among all the patients those who started receiving the treatment first were three Liberian health workers. The medical professionals informed Wednesday that they are showing signs of recovery; however experts still caution about the effectiveness of the drug. According to the ministry's statement the patients are showing very positive signs of recovery and their progress is remarkable. But even if it is really effective the manufacturers of the drug in US said that more supplies of the drug won t be