This Urgent Public Health study has been established to assess the long-term effects of COVID-19 on patient health and recovery in 10,000 participants across the UK.
Mae'r astudiaeth frys hon o iechyd y cyhoedd wedi'i sefydlu i asesu effeithiau hirdymor COVID-19 ar iechyd ac adferiad cleifion ymysg 10,000 o gyfranogwyr ledled y DU.