Trials of a Covid-19 vaccine being developed by AstraZeneca and Oxford University will resume after it was paused due to a reported side effect in a patient in the UK.
On Tuesday, AstraZeneca said the studies were being paused while it investigated whether the reported side effect was connected with the vaccine.
But on Saturday, Oxford University said it had been deemed safe to continue.
The vaccine is seen as a strong contender among dozens being developed.
Oxford University said in a statement that it was “expected” that “some participants will become unwell” in large trials like this one.
The University of Oxford said, “’The ongoing randomised controlled clinical trials of the Oxford coronavirus vaccine ChAdOx1 nCoV-19 will resume across all UK clinical trial sites.
“Globally some 18,000 individuals have received study vaccines as part of the trial.
“In large trials such as this, it is expected that some participants will become unwell and every case must be carefully evaluated to ensure careful assessment of safety.
“On Sunday (06/09/2020) our standard review process triggered a study pause to vaccination across all of our global trials to allow the review of safety data by an independent safety review committee, and the national regulators. All routine follow-up appointments continued as normal during this period.
“The independent review process has concluded and following the recommendations of both the independent safety review committee and the UK regulator, the MHRA, the trials will recommence in the UK.”
It did not give any information about the patient or the nature of the side effect were given.
But the New York Times has previously reported the patient had been diagnosed with transverse myelitis, an inflammatory syndrome which affects the spinal cord and is often sparked by viral infections.