The antigen test, which is commonly known as a swab or PCR (polymerise chain reaction) test, is used to test whether a person is currently infected with coronavirus.
Defnyddir y prawf antigenau a elwir yn gyffredinol yn brawf swab, neu adwaith cadwynol polymerasau i brofi a yw person wedi’i heintio â’r coronafeirws ar hyn o bryd.