Back from my day of testing.
We had several positives, but not loads and loads. I had 2 personally. They seemed to tally with the sorts of numbers we are seeing in the community in terms of ratios.
I think they would have been completely useless using them in Australia when you were basically zero covid or single digits. They throw out a false positive rate of 1 in 1000 which is tiny. But just say you were still zero covid and they sent a pack out to every person in the land and say, half of the population decided to do one. It would throw out 10,000 false positive cases, causing panic.
Over here you can have a PCR test, and so can your family, if a lateral flow tests positive and with only a 1 in 1000 false rate they are damn likely to and at least you know where you are.
So if you have 100 covid positive people and each does a lateral flow, 68 will show positive according to the stats on them. So it's a useful health screening tool, because if you are asymptomatic (like the kids I tested today) but have Covid, we can tell them, and they won't turn up at College on Monday. They'll be self isolating. Their parents may well get a PCR test and end up self isolating. Their siblings might do a lateral flow and realise they have it too. Etc etc.
So they are not perfect but actually my feet are aching today from running around in full PPE but it was worthwhile, because 2 kids with Covid are at home, not out and about.
Also, they were vaccinating them today - we were encouraged to send them to the end of the hall to "have a chat" with the NHS people who had arrived who were vaccinating. So quite a good chunk of unvaccinated 16 year olds have a sore arm tonight. I was not expecting that but there you go.