Mae'r Prif Swyddog Meddygol hefyd yn nodi’n glir nad oes digon o dystiolaeth i gyfiawnhau gofyn i weithwyr mewn lleoliadau nad ydynt yn rhai clinigol wisgo masgiau meddygol.  Mae'n parhau i fod o'r pwys mwyaf fod staff iechyd a gofal cymdeithasol yn cadw at y rheolau pellter cymdeithasol bob amser, ac yn dilyn arferion da o ran golchi dwylo a hylendid anadlol. Yng Nghymru, mae gan sefydliadau iechyd a gofal cymdeithasol ddyletswydd gyfreithiol i sicrhau bod modd cadw pellter cymdeithasol. Yn amlwg, mewn amgylchiadau eithriadol lle bo hyn yn amhosibl, mae’n rhaid i rhaid i staff gael gwisgo masg meddygol os dymunant.
The Chief Medical Officer is clear also there is insufficient evidence to support the wearing of medical masks by workers in non-clinical settings.  It remains of paramount importance that health and social care staff observe social distancing in all situations, while adhering to good hand and respiratory hygiene practices. In Wales, health and social care organisations are under a legal duty to ensure that social distancing is possible. Clearly, should there be exceptional circumstances in which social distancing is impossible, then staff must be able to wear a medical mask should they wish to.