London: A British trial of the AstraZeneca Covid-19 vaccine on kinds has been paused, Oxford University said Tuesday, as global regulators rush to assess its possible link to rare blood clots in adults.

The university said in a statement that there were "no safety concerns" in the trial, but acknowledged fears over a potential link to clots by saying that it was awaiting additional data from Britain's Medicines and Healthcare products Regulatory Agency (MHRA) before restarting the study.

The trial, which started in February, is evaluating whether the vaccine generates a strong immune response in those aged between 6 and 17.

While the trial has been paused, Professor Andrew Pollard from the University of Oxford ruled out safety concerns with the trial itself, the BBC reported on Wednesday.

"Parents and children should continue to attend all scheduled visits and can contact the trial sites if they have any questions," it added.

"Whilst there are no safety concerns in the pediatric clinical trial, we await additional information from the MHRA (Medicines and Healthcare products Regulatory Agency) on its review of rare cases of thrombosis/thrombocytopaenia that have been reported in adults, before giving any further vaccinations in the trial," Pollard was quoted as saying by the BBC.

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