Ymchwilwyr o brifysgolion Cymru oedd y cyntaf yn y DU i gynnal arolwg cenedlaethol o’r COVID-19 mewn canolfannau trefol mawr ac yng Nghymru y cafodd y dechnoleg ei datblygu i allu gwneud hyn.
Researchers from Welsh universities were the first to start the national surveillance of COVID-19 in major urban centres in the UK, and the technology to do this was first developed in Wales also.