Europe has doubled its deal with Pfizer-BioNTech to gain access 600million doses of the vaccine.
75million doses will be available by June, with the remainder delivered in the second half of the year.
The EU Commission defended its vaccine strategy amid criticism the roll-out was too slow, and too few jabs had been purchased.
Its President Ursula von Der Leyen said the increased supply would speed up Europe's inoculation campaign:
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