The EU has agreed a contract to buy at least an additional 150 million doses of the Moderna COVID-19 vaccine.
Those extra doses will be delivered in 2021, with an option to purchase an additional 150 million in 2022.
According to the European Commission, it means the EU will have access to up to 2.6 billion doses of vaccines from seven different suppliers - BioNTech/Pfizer, AstraZeneca, Sanofi-GSK, Janssen Pharmaceutica NV (Johnson & Johnson), Curevac and Moderna.
The EU has faced growing pressure over the speed of its vaccine rollout compared to countries such as the UK, US and Israel.
There have been some calls for member states to seek their own contracts with manufacturers to speed up the vaccination process.
However, the European Commisson President Ursula von der Leyen insists member states should not be making bi-lateral deals with companies.
She said: "It's very clear in the contracts we have with the member states, that they're not supposed to have bilateral negotiations with the pharmaceutical companies.
"If this would be the case, they would have to notify - and I have no knowledge of any kind of side contract."
