Ann: Positive Results from IHL-675A (ARDS) in vitro Study, page-63

Absolute ripper result here,
Correct me if I'm wrong but the fact that this was a complete success pretty much de-risks the whole trial doesn't it? The next animal study will be about finding optimal dosage leading into FDA emergency use approval, meaning that the hard yards have already been completed?
My understanding would be that from here we have a very small chance of failure and an almost certain chance of success? Am I correct in assuming this?
Thanks holders!