Canfu gwerthusiad o’r cynllun peilot profi asymptomatig ym Merthyr Tudful a Chwm Cynon Isaf ym mis Tachwedd a mis Rhagfyr, a gyhoeddwyd ar 22 Mawrth, fod yr ymyrraeth yn gosteffeithiol iawn a’i bod wedi cael effaith gadarnhaol, uniongyrchol ar lefel COVID-19 a oedd ar led yn y cymunedau hynny. Mae’r canfyddiadau’n nodi ei bod yn debygol bod profion asymptomatig wedi cyfrannu at y gostyngiad a fu mewn cyfraddau achosion COVID-19, ar ôl gweithredu’r cynllun peilot a chyflwyno’r cyfyngiadau symud cenedlaethol ar 20 Rhagfyr 2020. Amcangyfrifir y cafodd 353 o achosion o COVID-19 eu hatal, sy’n golygu 24 o dderbyniadau i’r ysbyty, 5 derbyniad i Unedau Gofal Dwys a 14 o farwolaethau a fyddai wedi digwydd fel arall.
The evaluation of the asymptomatic testing pilot in Merthyr and Lower Cynon in November and December, published 22 March, found the intervention was very cost effective and had an immediate, positive impact on the level of COVID-19 circulating in those communities. The findings note asymptomatic testing likely contributed to the subsequent decline in COVID-19 case rates which occurred, following the pilot and the introduction of the national lockdown on 20th December 2020. An estimated 353 cases of COVID-19, 24 hospitalisations, 5 Intensive Care Unit admissions and 14 deaths, that would have otherwise occurred, were prevented.