The location of tests has been re-categorised from 12 August 2020 for current and historic data to reflect the different testing pathways an individual may experience.
Cafodd lleoliad profion eu hail gategoreiddio o 12 Awst 2020 ymlaen ar gyfer data presennol a hanesyddol i adlewyrchu’r gwahanol lwybrau profi y gall unigolyn eu dilyn.