A doctor told me that the first guy in Wa. state ., was used as a case study.. On the fourth day they discovered corona in his stool..Forget what he said now, but it was something they gave him on day 7 and by day 8 he was all better..I believe it was anti virals that they tried first and then antibiotics on day 7 that worked..or maybe the other way around..sorry forgot..They checked all his vitals everyday.
https://www.nytimes.com/2020/03/04/us/coronavirus-in-washington-state.html