Mae risgiau iechyd cyhoeddus clir o hyd wrth ailddechrau teithio rhyngwladol ar hyn o bryd – ac o gael gwared ar gyfyngiadau cwarantin i'r rheini sy'n cyrraedd o’r Unol Daleithiau a gwledydd yr UE ar y rhestr oren sydd wedi'u brechu'n llawn. Heb y gofyniad i hunanynysu ar ôl cyrraedd mae risg uwch o fewnforio achosion ac amrywiolynnau sy'n peri pryder (VoCs) o dramor. Bydd y brechlynnau'n lleihau'r risg honno, ond dim ond os ydynt yn effeithiol yn erbyn VoCs. Dyna pam yr ydym yn parhau i rybuddio rhag teithio dramor yr haf hwn os nad yw'n hanfodol i wneud hynny.
There remain clear public health risks posed by re-opening international travel and removing quarantine restrictions to US and EU fully vaccinated amber arrivals at this time. Without self-isolation requirements upon arrival there is a higher risk of importing cases and variants of concern (VoCs) from abroad. Vaccines will reduce this risk, but only if they are effective against VoCs. This is why we continue to caution against international travel for non-essential reasons this summer.