Data for Welsh treated smokers who were Carbon Monoxide (CO) validated as quitting at 4 weeks post quit date is available up to March 2020.
Data ar ysmygwyr sy’n byw yng Nghymru sy’n gwneud ymgais i roi’r gorau iddi drwy’r gwasanaethau rhoi’r gorau i ysmygu ar gyfer Ionawr i Fawrth 2022.