The Moderna, Oxford/AstraZeneca, Pfizer/BioNTech and Janssen vaccine - available later this year - are currently approved for use in the UK., has yet to be licensed.
Tom Williams, from Denbigh, said he was "happy to be a guinea pig" but issues arising after having the jab left him feeling "frustrated". They will explain how, if trial participants meet the eligibility criteria, they will be offered their booster, or if they require one, how to get a further primary course of vaccine to enable them to get a Covid travel pass.
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