Currently there is no substantial evidence to suggest the Omicron variant will lead to a more severe form of illness but the data is being kept under constant review.
Ar hyn o bryd nid oes tystiolaeth sylweddol i awgrymu y bydd yr amrywiolyn Omicron yn arwain at fath mwy difrifol o salwch, ond mae sylw manwl a chyson yn cael ei roi i’r data.