Hey, my father-in-law, who's 63, was admitted on an oxygen bed on May 1st with a saturation level of 88. He tested positive for Covid19 and he's been getting treated in the hospital. Yesterday, his oxygen was at 15 liters, and his saturation was about 95, but today it's dropped back to 88 without oxygen support. The hospital suggested he might be discharged in 2 days since he's been physically good and active. So I'm really wondering, should we be worried about this drop in saturation? Is it something unusual or potentially dangerous? And is it safe for him to be discharged after just 2 days? I'm trying to understand if an oxygen level of 88 is bad or if it's something normal with recovering patients?