In Wales, during the period from 1 to 21 June, 1,905 positive cases were referred to local and regional contact tracing teams.
Yng Nghymru, yn ystod y cyfnod rhwng 1 a 21 Mehefin 2020, cyfeiriwyd 1,905 o achosion positif at dimau olrhain cysylltiadau lleol a rhanbarthol.