A trial of the Oxford-AstraZeneca vaccine on children has been informally suspended while scientists investigate a possible link with rare blood clots in adults.
The University of Oxford has told the BBC that there are no safety concerns with the trial itself but its scientists were waiting for further information.
The UK medicines regulator is reviewing rare cases of thrombosis that have been reported in adults who’ve been vaccinated.
The UK prime minister Boris Johnson has urged people to go ahead with scheduled vaccinations and reduce the risk of a third wave of infections.
Huw Edwards presents BBC News at Ten reporting by medical editor Fergus Walsh.
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