Rapid antigen tests can detect whether proteins of the COVID-19 coronavirus are present in your body.
RATs can sometimes detect COVID-19 before you develop symptoms. They’re not as accurate if you don’t have symptoms and can produce either false negative or false positive results.
RATs are quick — returning a result within 10 to 20 minutes. You can do the test at home and in your own time, and without a doctor.
If you get a positive result, you should isolate at home for at least 7 days and contact your GP immediately.