Remdesivir has shown past efficacy against other severe corona viruses, MERS and SARS in
animal models, not human testing. So the theoretical hope is that it will also work against this corona virus.
There are ongoing controlled studies testing remdesivir both in the US and elsewhere. I am hopeful this will be an effective therapy. The one downside is that this drug is under patent and price will be, I suspect, substantial. It also is an IV drug, not oral.