Mae tua 80 y cant o bobl 12 oed a hŷn yn gymwys i gael y pigiad atgyfnerthu ar hyn o bryd. O'r rheini, mae 71 y cant eisoes wedi cael eu pigiad. Bydd byrddau iechyd yn cysylltu â phawb na allent wneud eu hapwyntiadau mis yma a gofyn iddynt aildrefnu ym mis Ionawr.
Around 80 per cent of people aged 12 and above are currently eligible for the booster. Of those, 71 per cent of people have already had their booster. Health boards will be contacting everyone who couldn’t make their appointments this month and asking them to reschedule in January.