In the context of Norfolk and Waveney's overall adult population, two-thirds or 66.2pc have had one jab.
On Wednesday, it was announced that those aged under 30 would be offered an alternative vaccine to Astrazeneca amid concerns over links to rare blood clots.
Dr Anoop Dhesi, chairman of NHS Norfolk and Waveney Clinical Commissioning Group (CCG), said: “We know some people may be concerned by things they have seen in the news over the last few days related to very rare side effects. I would like to emphasise that the UK medicines regulator has said benefits of the AZ vaccine continue to outweigh any risks - the risk of mortality from Covid is much greater than the risk of mortality from these side effects."