Mae'n hanfodol bod pawb yn deall na all profi ar ei ben ei hun ddileu'r risgiau sy'n gysylltiedig â dal a throsglwyddo Covid-19.  Mae profi yn gam lliniaru risg y mae angen ei gymryd ochr yn ochr â mesurau eraill i reoli ac atal haint, defnyddio cyfarpar diogelu personol yn effeithiol a mesurau cadw pellter cymdeithasol a hylendid dwylo priodol.  Er nad yw LFTs mor sensitif â phrofion RT-PCR mewn labordai, drwy brofi'n amlach gydag LFTs, megis ddwywaith yr wythnos, mae cyngor gwyddonol wedi dangos bod eu cywirdeb yn cyfateb i brofion RT-PCR.
It is vital everyone understands that testing alone cannot eradicate the risks associated with contracting and transmitting Covid-19.  Testing is a risk mitigation step that needs to be taken alongside other infection prevention control measures, the effective use of personal protective equipment and appropriate social distancing and hand hygiene measures.  While LFTs are not as sensitive as lab-based RT-PCR tests, scientific advice has indicated that by testing more frequently with LFTs, such as twice per week, their accuracy is on a par with RT-PCR tests.