Oxford University Covid vaccine trial put on hold due to adverse reaction in participant

A spokesman for AstraZeneca, the company working on the coronavirus vaccine, said pausing trials was common during vaccine development

The development of a promising Covid-19 vaccine has been put on hold due to an adverse reaction in a trial participant.

A spokesman for AstraZeneca, the company working with a team from Oxford University, told the Guardian the trial has been stopped to review the potentially unexplained illness" in one of the participants.