The Anglo-Swedish drugmaker mistakenly gave some volunteers a half dose of the vaccine during clinical trials, and it has been criticized for omitting crucial information from its public statements. US regulators have questioned the accuracy of its vaccine data, and severe production delays in Europe have resulted in a political firestorm and a breakdown in relations with EU leaders.

“What we have with AstraZeneca is a company that is not straightforward, that cannot be relied upon,” Philippe Lamberts, a Belgian member of the European Parliament, said in a radio interview with the BBC on Wednesday.

AstraZeneca’s (AZN) failure to deliver tens of millions of promised doses to the European Union, which is struggling to roll out vaccination programs, led the bloc to impose export restrictions that have already prevented at least one shipment of vaccines to Australia. Leaders could move to make the restrictions even tighter Thursday…

“They’ve made one mistake after the other,” said Jeffrey Lazarus, head of the health systems research group at the Barcelona Institute for Global Health.