The figures may also include some close contacts eligible for follow-up by local contact tracing teams that were identified by positive cases escalated to regional teams for onward management.
Mae’n debygol y bydd gan achosion positif gysylltiadau agos ychwanegol o’r ysgol a fydd yn cael eu cyfathrebu i dimau olrhain cysylltiadau lleol a bydd y rhain yn gymwys i gael camau dilynol.