Yr awgrym yw bod nifer yr achosion yn ardal Abertawe yn arafu, ac efallai bod sail dros rywfaint o optimistiaeth ynghylch nifer yr achosion yn yr ardal hon dros yr wythnosau i ddod. Fodd bynnag, mae’n rhy gynnar i ddweud bod yr achos ar ben, gan fod cyfran sylweddol o bobl ym mhob rhan o Gymru a allai gael y clefyd o hyd. Mae pryder penodol ynghylch ardal Gwent lle mae dros 100 o achosion wedi’u nodi ers mis Tachwedd ac mae’r niferoedd sydd wedi cael y brechlyn yn y grŵp oedran sy’n dioddef fwyaf, sef 10 i 18 oed, yn rhy isel o hyd i atal achosion yn y dyfodol.
There are indications that the number of notifications from the Swansea area is slowing down and there may be grounds for cautious optimism in respect of numbers of cases from this area over the coming weeks. However, it would be premature to say that the outbreak is over, as there remain significant proportions of susceptible people in all areas of Wales.  There is particular concern for the Gwent area, where there have been over 100 reported cases since November and MMR uptake in the hardest hit age group, 10 to 18 years, is still too low to prevent future outbreaks.