Common current theory as to why infection rates are increasing yet death rates aren’t (yet) is because it is younger people that are catching it – they’re less likely to die from it.
There is anecdotal evidence from hospital workers to support this, I have read, though I’m sure no scientific study on it.
I keep a running weekly tally of death rates in several areas of interest (to me) and the area that did away with lockdown first did see a jump in death rates last week. I’m anxious to see if that trend continues when I run the numbers later this week.