T he European Union prosecutor’s office has launched an investigation into the bloc’s procurement of billions of Covid-19 vaccine doses, amid allegations of corruption and secret backroom dealings from several members of the EU parliament. EU officials announced the probe in a brief  statement  on Friday, confirming an  “ongoing investigation into the acquisition of Covid-19 vaccines in the European Union.”  They added that the case follows  “extremely high public interest”  around the issue, though declined to share any other details. While prosecutors were tight-lipped about the exact nature of the probe, the announcement follows  allegations  from MEPs that European Commission President Ursula von der Leyen conducted vaccine negotiations with Pfizer CEO Albert Bourla in secret. Despite requests from journalists, lawmakers and an EU watchdog, von der Leyen’s office has failed to produce personal text messages sent to Bourla during talks for near...