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(FILES) In this file photo taken on April 23, 2021 Pfizer CEO Albert Bourla talks during a press conference with European Commission President after a visit to oversee the production of the Pfizer-BioNtech Covid-19 vaccine at the factory of US pharmaceutical company Pfizer, in Puurs. – Pfizer CEO Albert Bourla said on May 6, 2021 he was against a US-backed proposal to waive patents on Covid-19 vaccines, saying production should be ramped up in existing facilities instead. (Photo by JOHN THYS / POOL / AFP)