Scientists are aware people will continue to test positive for up to 90 days after their initial positive PCR test – even though that could mean they have to go back into self-isolation. Unfortunately you cannot overrule a positive Covid test and you will still have to self-isolate. Alex Walker via Getty Images Antigen Lateral Flow Rapid Qualitative Test KitWhy are lateral flow tests different? In some cases, you may be able to use a lateral flow test rather than a PCR test. These are usually used for people with symptoms or who have been near a positive Covid case and can detect Covid very early into the illness.

Source: Huffington Post August 18, 2021 11:48 UTC