“Fe allwn ni fod yn rhesymol hyderus bod y rhaglen frechu wedi gwanhau’r cysylltiad rhwng haint a salwch difrifol. Ond mae yna risg o hyd y gallai’r drydedd don hon o’r pandemig greu niwed gwirioneddol – naill ai yn uniongyrchol yn sgil y feirws neu’n anuniongyrchol, er enghraifft yn sgil gorfod ynysu.
“We can be reasonably confident that vaccination has weakened the link between infections and serious illness. But there is still a risk that this third wave of the pandemic could cause real harm – either direct harm from the virus or indirect harm from for example people having to isolate