Isolating after a positive coronavirus (COVID-19) test - DfE Guidance (12/03/2021)
'We have heard from schools that some parents are frustrated that their children have been sent home from school as a result of receiving a positive coronavirus (COVID-19) test result or being a close contact of someone who has tested positive, particularly if they have then obtained a PCR test for their child and they have tested negative on that. You may want to use the following text with any parents who raise this as an issue with you:
As schools return to full attendance, we understand parents’ frustration when their child is asked to isolate at home either after testing positive for coronavirus (COVID-19), or because of being in close contact of someone who has tested positive.
However self-isolation is one of the most important things we can do to help stop the spread of the virus and help protect our friends, family and our community. Around one in three people with coronavirus (COVID-19) have no symptoms, and so finding and isolating these hidden cases quickly will help to stop outbreaks before they get a chance to develop.
If your child has tested positive having been tested using a lateral flow device (LFD) test at school, they do not need a PCR confirmation because these tests are done in a supervised environment. Lateral flow device tests are at least 99.9% specific, meaning the likelihood of a false positive is extremely low – less than 1 in every 1,000. PCR testing will always carry a risk of producing false negatives. At the moment, carrying out LFD tests in supervised conditions and not carrying out confirmatory PCR testing means we capture the maximum possible number of coronavirus (COVID-19) infections during the initial return to school period.
Once your child starts testing at home using lateral flow tests, positive results must be followed up with a confirmatory PCR test (as these tests are not conducted in a controlled environment).'