Her comment came after the AstraZeneca vaccine was suspended by 13 countries across the European Union and several national regulators expressed safety worries about blood clots.
The European Medicines Agency is investigating reports of 30 cases of unusual blood disorders among 5 million recipients, but said it itself did not see a reason to change its recommendation that the AstraZeneca vaccine remained safe.
More than 24 million people in Britain have so far received their first dose, with over 11 million having received the AstraZeneca shot.
Prime Minister Boris Johnson's spokesman said on Tuesday there was no evidence that blood clots were any more likely to occur after people had been given the AstraZeneca vaccine, citing the view of Britain's medicine regulator.
Reuters