Maen nhw wedi bod yn mesur presenoldeb y feirws SARS-CoV-2 mewn dŵr gwastraff oherwydd bron bob tro y ceir achosion wedi’u cadarnhau o’r coronafeirws, mae’r feirws wedi bod yn bresennol mewn gwastraff dynol.
They have been measuring the presence of the SARS-CoV-2 virus in waste water as the presence of this in human waste is common in almost all confirmed coronavirus cases.