It argued the original ruling had failed to properly account for all the relevant facts and legal issues in the case, and said it would not disclose the specific grounds of its appeal, its strategy or the evidence it plans to present, citing the need to protect Poland's position in the proceedings.
The legal action "is being carried out with the support of the State Treasury's General Counsel's Office and specialist law firms, and is aimed at protecting the interests of the state, the public interest and the security of the healthcare system," the ministry said in a statement.
The case centres on a European Commission contract, signed on behalf of EU member states, for Covid-19 vaccine deliveries.
Poland refused to collect part of its order in 2022, citing the changed epidemic situation and the war in Ukraine.
Pfizer took the matter to a Brussels court in September 2023.
Under the April ruling, Poland must accept around 64 million doses and pay Pfizer and BioNTech PLN 5.644 billion (EUR 1.3 billion), plus roughly PLN 170 million (EUR 39 million) in legal costs.
The judgment has already had knock-on effects.
Eurocontrol, the European aviation safety body, moved last month to enforce the ruling by freezing funds belonging to PANSA, Poland's air navigation service provider.
The Polish organisation has separately contested the freeze in a Brussels court, saying the case has nothing to do with its own operations.
A preliminary hearing in that dispute is due in mid-August.
(ał)
Source: IAR, PAP