Rapid Tests - Are They False Positives or Just Real?

Study looked at almost a million rapid tests and found that the rate of false positives in anagen testing is quite low. But can happen? I'm actually, greater than 50 % of the false positives found, as confirmed by a negative pc rs, were from the same batch of a particular company. So this study was really only done among a symptomatic patient, so we can't make inferences about how the false positive rate would generalize to people with symptoms.