Evidence shows that lateral flow tests are more than 90% effective at detecting those who are most infectious when they use the test and therefore most likely to transmit the virus.
Dengys y dystiolaeth fod y profion llif unffordd 90% yn effeithiol wrth ganfod y rhai sydd fwyaf heintus pan gymerant y prawf ac felly’n fwyaf tebygol o drosglwyddo’r feirws i eraill.