O ran plant a phobl ifanc 12-15 oed nad oes ganddynt gyflyrau iechyd sy’n bodoli eisoes, mae’r Cyd-bwyllgor wedi cynghori bod manteision brechu ychydig yn fwy na’r niwed posibl y gwyddom amdano, ond bod ansicrwydd sylweddol o ran maint y niwed hwn. O safbwynt manteision iechyd i unigolion, nid yw’r Cyd-bwyllgor ar hyn o bryd yn credu bod y manteision yn ddigon i gefnogi cyngor ar gyfer rhaglen frechu gyffredinol i blant 12-15 oed sy’n iach fel arall. Fodd bynnag, maent yn cydnabod bod materion ehangach i’w hystyried, materion nad yw’r Cyd-bwyllgor yn gyfrifol am eu gwerthuso o fewn ei gylch gwaith. Er enghraifft, effeithiau strwythurol ehangach, gan gynnwys manteision addysgol, lle byddai’r Prif Swyddog Meddygol mewn sefyllfa well i roi cyngor, gyda sylwadau gan y Cyd-bwyllgor.
On children and young people aged 12-15 who do not have underlying health conditions, the JCVI have advised that the benefits from vaccination are marginally greater than the potential known harms but that there is considerable uncertainty regarding the magnitude of the potential harms. From an individual health benefit perspective, they feel the margin of benefit, is considered too small to support advice on a universal programme of vaccination of otherwise healthy 12-15-year-old children at this time. They do however acknowledge that there may be wider issues to consider which are outside the remit of the JCVI to evaluate, such as wider societal impacts, including educational benefits, where the CMO would be better placed to advise, with representation from JCVI.