Mae byrddau iechyd yn gwneud cynnydd da yn barod o safbwynt darparu’r brechiad atgyfnerthu, brechu pobl ifanc 16 a 17 oed a phobl ifanc o 12-15 oed, gan gynnwys y rheini sy’n wynebu’r risg fwyaf oherwydd bod ganddynt gyflyrau iechyd eisoes.
Health boards are already making good progress in providing the booster, vaccinating 16 and 17 year olds and 12-15 year olds, including those most of risk due to underlying health conditions.