Philip Sherwell October 3, 2014 The US government is scrambling to start production of the experimental Ebola drug that is viewed as the most promising medical treatment in the fight against the virus. The ZMapp serum was used to treat two American missionaries who recovered from Ebola, but is not available for the Dallas man currently fighting the disease as the limited supplies made for clinical trials ran out in August. Federal officials and two of the world’s largest charities are in advanced talks with pharmaceutical companies to launch accelerated production from genetically-engineered tobacco plants and animal cells. But even...