A lot of speculation. Is there a way to know the average hospital duration in SA for people without a previous infection? I know the current data in SA says i

A lot of speculation. Is there a way to know the average hospital duration in SA for people without a previous infection? I know the current data in SA says it went from 8,5 days to 2,5 days. The variable currently, if the data can be cross-referenced to other countries, is the high infection rate of delta in SA. Excluding previously infected from hospital stay would create an educated guess in my eyes. If it stays <3,5 days for example, that would seem like good news.