I hope I dont get in trouble for saying this, but this is why things look different in the EU vs. the US. Here in Germany and many other countries they are looking for the needles in the haystacks ( asymtomatics). For example, kids have been tested since school start this year at least 3x a week in school, to find asymtomatic cases. Not just school but many other places. so of course numbers went up, since numbers went up, restrictions go up. Now for restaurants, some stores, and health clubs etc.. you have to be fully vaxed AND have a quick antigen test. If you are boosted you are exempt. I went to see the latest spiderman with my DD, who is fully vaxxed and not boosted, they tested at a pop-up testing tent at the theater.
her BF, fully vaxxed got an in-school postive, follow-up at the DR with a PCR test. positive. Fully vaxxed 15 year-old, had headache for one day, in quarantine over Christmas for 14 days ( and yes our health departments calle EVERY day to check if you are following this rule).
Just one other thing, here in Germany the antigen fast test is used to screen, if positive you then go get a PCR. The KPI "postive rate" here is based on only the Positive PCR test group. And with so many being tested daily, you are screening out most negatives with the antigen, hence the really high postive rate based off the PCR. It's the development over time that matters here.