A trial participant for a promising Covid-19 vaccine suffered from mysterious neurological symptoms including limb weakness or "changed sensation", new research papers show.
The University of Oxford and partner AstraZeneca paused the trial of the vaccine over the scare last week.
However, the trial has since resumed and researchers say the symptoms, which arose in a participant in the UK, were likely not linked to the shot.
"After independent review, these illnesses were either considered unlikely to be associated with the vaccine or there was insufficient evidence to say for certain that the illnesses were or were not related to the vaccine," a participant information sheet posted online by Oxford reads.
"In each of these cases, after considering the information, the independent reviewers recommended that vaccinations should continue."