Gall profion helpu i adnabod pobl nad oes ganddynt symptomau COVID-19, ond a all fod yn lledaenu’r feirws. Mae’n rhaid i’r rheini sy’n cael prawf positif hunanynysu yn syth ac osgoi pasio’r feirws i eraill.
Testing can help to identify people who do not have symptoms of COVID-19, but who may still be spreading the virus.  Those who test positive must immediately self-isolate to avoid passing the virus on to others.