I'm cautioning you all to take this seriously. It's very real. It's suppressing other, non c-19, people from getting healthcare.
And it's growing exponentially. Don't believe me? Go look at the total US infections. It's growing at just under 2% a day, doubling about once a month in total numbers infected and daily increases.
Yes, there is some number of people infected that did NOT get tested. That's largely irrelevant... a full ICU is a full ICU. PPE is still in short supply. Testing reagents are in a nationwide shortage. Etc.
Concerning the kids passing it on. I don't know, and it does not appear to matter either. We can argue about the 'input' side of the equation all day long. Fact is, the 'output' side, the confirmed infected, is growing exponentially and steadily.