Mae yna lawer iawn nad ydym yn ei wybod o hyd am yr amrywiolyn newydd hwn. Nid ydym yn gwybod digon i ddweud a allai achosi salwch difrifol neu farwolaeth i fwy o bobl. Mae’r dystiolaeth sy’n dod i’r amlwg yn awgrymu bod brechlynnau’n effeithiol o hyd, yn enwedig o ran diogelu rhag clefyd difrifol.
There is still much we do not know about this new variant. We do not know enough to say whether it could lead to more people becoming seriously ill or dying. The emerging evidence suggests that vaccination is still effective, especially in terms of  protecting against severe disease.