Cofiwch na ddylai pobl deithio os oes ganddyn nhw neu rywun sy'n byw gyda nhw symptomau, os ydynt wedi cael prawf positif neu os oes swyddog olrhain cysylltiadau wedi gofyn iddynt hunanynysu.
Remember, no person should travel if they or someone they live with have symptoms, if they have a positive test or have been asked to self-isolate by a contact tracer.