Nurses at the Royal Free Hospital, London, simulate the administration of the Pfizer vaccine to support staff training ahead of the rollout, in London, Friday Dec. 4, 2020. (Yui Mok/Pool Photo via AP)
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Nurses at the Royal Free Hospital, London, simulate the administration of the Pfizer vaccine to support staff training ahead of the rollout, in London, Friday Dec. 4, 2020. (Yui Mok/Pool Photo via AP)
