COVID vaccines: should people under 50 in the UK be offered a fourth dose?
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Alessandro Siani, University of Portsmouth
It’s been nearly two years since Margaret Keenan became the first person in the world to receive an approved COVID vaccine at a clinic in Coventry on December 8, 2020. Since then, almost 13 billion doses of various COVID vaccines have been administered globally. And they are estimated to have prevented millions of…
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