I think many people have been in hospital and left just fine. Tbh I thought the COVID entrances and wards were completely separate to where other patients might be. I also reckon staff in COVID wards will only work in there. For example, I would like to think a cleaner on the covid ward wouldn't waltz in to your ward for a clean.
My 94-year old grandmother fell & broke her hip a couple of weeks ago. She was finally released from hospital on Thursday, and so far seems ok. Tbh my family and I had resigned ourselves to thinking she was going to catch Covid-19 in hospital, therefore may never actually leave. But after a lot of wrangling with social services to get her some kind of care (we all live 200+ miles away), she’s home and so far seems ok.