The aim is to provide a stable set of regulations for different levels of risk which seek to ensure that chains of transmission are kept to a minimum, to save lives and to help the NHS.
Y nod yw darparu cyfres sefydlog o reoliadau ar gyfer lefelau risg gwahanol sy'n ceisio sicrhau cyn lleied o gadwyni trosglwyddo â phosibl, er mwyn achub bywydau a helpu'r GIG.