Anyone who has ever had children at school will know that within a week or two of going back in September they are all full of cold. The same applies to teachers and students who start university.
The testing system is overwhelmed by people who are having to have their children tested because they have cold symptoms.
Clearly the majority of children having covid tests will just have a cold - did no-one see this coming?
I don't know what the answer is, it's important not to miss the very small minority who will actually have covid.