A very faint positive line on a lateral flow test may be a sign of a wrong Covid result, a doctor has said. London based medical professional Nathan, who posts under @expedition_doctor on Instagram, shared a picture of a lateral flow test with a barely noticeable positive line.
He said that if this line appears after the 30 minute window, then it does not count as a positive test. Nathan said that the appearance of the line may have been caused by very weak contaminant, such as food or drinks.
But if the line appears within the half an hour window, then Scots should self-isolate and book a PCR test as soon as possible - which is the same for people with symptoms of the virus.The doctor explained: “Essentially, if any line appears before