Yn ogystal â’r system cwarantin a phrofi hon, mae gennym system wyliadwriaeth sefydledig yng Nghymru. Mae cyfran o’r holl brofion a wneir yng Nghymru yn cael ei archwilio i weld beth yw’r dilyniant genom. Cafodd mwy na 25,000 o ddilyniannau eu cynhyrchu erbyn diwedd y llynedd – un o’r cyfraddau uchaf yn y byd.
In addition to this quarantine and testing system, we also have a well-established surveillance system in place in Wales. A proportion of all tests undertaken in Wales are genomically sequenced. More than 25,000 sequences were generated by the end of last year – one of the highest rates in the world.