The two negatives were PCR tests. Those are different from antigen tests. The blog post you've linked says there is a problem with false positives with PCR tests, but that doesn't seem to be relevant here, given that both of those results are negative.
The two negatives were PCR tests. Those are different from antigen tests. The blog post you've linked says there is a problem with false positives with PCR tests, but that doesn't seem to be relevant here, given that both of those results are negative.