Therefore, if an outbreak already exists in a care home, there is a need to assume that everyone has the virus and act accordingly, regardless of whether mass testing is applied.
Felly, os oes achosion yn bodoli eisoes mewn cartref gofal, mae angen tybio bod y feirws ar bawb a gweithredu yn unol â hynny, ni waeth a gaiff profion torfol eu rhoi ar waith ai peidio.