Andrew Pollard said there was “very reassuring evidence that there is no increase in a blood clot phenomenon here in the UK, where most of the doses in Europe been given so far”.
“It’s absolutely critical that we don’t have a problem of not vaccinating people and have the balance of a huge risk, a known risk of Covid, against what appears so far from the data that we’ve got from the regulators, no signal of a problem,” he said.
Ireland and the Netherlands on Sunday became the latest countries to suspend their use of the Oxford/AstraZeneca vaccine out of precaution.
Denmark, Norway and Iceland have also paused their rollout of the jab.
The pharmaceutical company had said the 15 incidences of deep vein thrombosis (DVT) and 22 events of pulmonary embolism reported among those given the vaccine was “much lower than would be expected to occur naturally in a general population”.
The World Health Organization and the European Medicines Agency have both said there is no evidence the use of the jab should be suspended.