What is a bad idea, though, is to use false positives to claim that cases are not currently rising. That is an argument we are likely to lose.

I think you can point to the enormous discrepancy between the number of "cases" and the number of hospitalisations/deaths now compared to, say, March/April, though. Especially if you factor in the massive increase in testing - which means people being identified as "cases" now would not have been picked up at all in March/April (as they weren't sufficiently ill to come to the attention of the health services).

The number of "cases" must have been much higher in March/April - but we really only knew about the genuine cases and not all the asymptomatic or mildly ill people.

I also think it's very misleading of the media to suggest the known rise in positives in younger age groups reflects a change in the pattern of infection. It's possible that younger people were getting infected all along, but we just didn't know about it since so few of them were ill enough to consult a doctor.