identifying workers who were previously on the Shielding Patient List and seeking to avoid any close contact with a symptomatic case of a communicable disease working in close proximity to them
nodi gweithwyr a oedd gynt ar y Rhestr Cleifion a Warchodir a cheisio osgoi unrhyw gysylltiad agos ag achos sydd â symptomau clefyd trosglwyddadwy yn gweithio'n agos atynt