They are roughly on track. I don't understand their thinking, but those numbers are roughly as forecast. They expected 18% infection by the end of April IIRC, a

They are roughly on track. I don't understand their thinking, but those numbers are roughly as forecast. They expected 18% infection by the end of April IIRC, and measured 7.3% antibodies (which trail infection by a few weeks). Hospital admissions have been flat or even shrinking a little in Stockholm for weeks now, which can only be a sign that they're approaching herd immunity, AFAICT, even if they're nowhere near the common estimate of 60%. Note that herd immunity isn't a goal in Sweden. It's a state they expect to reach (before vaccines become available) but it's not a policy goal.