As soon as people start to display symptoms of coronavirus (COVID-19), they should arrange to take a test as quickly as possible whilst they and members of their household self-isolate.
Cyn gynted ag y bydd pobl yn dechrau dangos symptomau o coronafeirws (COVID-19), dylent drefnu prawf mor gyflym â phosibl wrth iddyn nhw, a'r bobl sy'n byw yn yr un tŷ â nhw, hunanynysu.