The at-home rapid tests are very accurate at detecting negatives, somewhere about 97%. Positives, odds are a bit over 50-50 that your positive is really negative. Now the dicey part of those numbers is the "control" was the PCR test.Not first hand, but yesterday my 5-year old woke up and said he had a headache. He's never said this before, and due to daycare sending an email out about a possible covid exposure there in the days prior, we tested him. Positive. He laid around with a mild fever and watched TV yesterday.
This morning he woke up feeling fine and asking to go fishing. We tested him. Negative. I'm taking him fishing.