The asymptomatic aspect of the data has been collected from 18 June and included in this release from 22 June, so there is a full week of data.
Mae elfen asymptomatig y data wedi cael ei chasglu ers 18 Mehefin, a’i chynnwys yn y datganiad hwn o 22 Mehefin ymlaen, felly ceir wythnos lawn o ddata.