Amcangyfrifodd Arolwg Heintiadau COVID-19 y Swyddfa Ystadegau Gwladol ar gyfer yr wythnos yn gorffen 20 Gorffennaf fod gan 5.14% (1 o bob 19) o boblogaeth gymunedol Cymru COVID-19, sydd wedi gostwng o 6.03% (1 o bob 17) yr wythnos ynghynt.
The ONS COVID-19 Infection Survey for the week ending 20 July estimated that 5.14% (1 in 19) of the community population in Wales had COVID-19, down from 6.03% (1 in 17) the previous week.