Ursula von der Leyen, European Commission president.
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LONDON — European Commission President Ursula von der Leyen said it herself: “The start was tough.”
The European Union has had a bumpy Covid-19 vaccine rollout. The campaign has prompted complaints that regulators were too slow to approve the shots and led to a simmering tussle with AstraZeneca as the pharmaceutical giant repeatedly slashed its delivery commitments.
The World Health Organization expressed concern…