Two injections of RG-101, an experimental drug that targets the micro RNA miR-122 in liver cells, combined with direct-acting antiviral agents (DAAs) taken for just 4 weeks led to 12-week post-treatment sustained response in 97% of chronic hepatitis C patients, according to study results presented at the European Association for the Study of the Liver's International Liver Congress (EASL 2016) last week in Barcelona.