“The big concern for me is the autumn and winter,” he said, with one looming question being whether children would be vaccinated to prevent a new wave of transmission in the fall.

“We cannot assume that we are through this pandemic, and I do have a major concern for the period September to February 2022,” he said. “We need to be preparing for that during the summer and we don’t need to get into the optimism bias of the summer of 2020.”

Monika Pronczuk contributed reporting from Brussels and Mujib Mashal from Delhi.

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