Further information can be found in our data explainer including what is included in the each location category: Understanding data on coronavirus (COVID-19) testing.
Gellir dod o hyd i wybodaeth bellach yn ein hesboniad gan gynnwys yr hyn sy’n cael ei gynnwys ym mhob categori lleoliad: Deall data ar brofion y coronafeirws (COVID-19).