Mae cyfraddau achosion yng Nghymru wedi bod yn codi, ac o ganlyniad mae nifer y cysylltiadau y gofynnir iddynt hunanynysu, boed hynny gan swyddogion olrhain cysylltiadau Profi Olrhain Diogelu (TTP) neu drwy Ap Covid 19 y GIG, hefyd wedi bod yn cynyddu.  Fodd bynnag, mae'n bwysig nodi nad yw cyfraddau’r achosion a’r cysylltiadau, ar hyn o bryd, ar yr un lefelau ag y maent mewn mannau eraill yn y DU.
Case rates in Wales have been rising and consequently the number of contacts being asked to self-isolate, whether by a Test Trace Protect (TTP) contact tracer or via the NHS COVID-19 App, has also been increasing. However it is important to note that, at the present time, case rates and contacts are not at the levels seen elsewhere in the UK.