AstraZeneca puts COVID-19 vaccine trials on hold after recipient’s ‘potentially unexplained illness’
Late-stage studies of AstraZeneca’s COVID-19 vaccine candidate are on temporary hold while the company investigates whether a recipient’s “potentially unexplained” illness is a side effect of the shot.
In a statement issued Tuesday evening, the company said its “standard review process triggered a pause to vaccination to allow review of safety data.”
AstraZeneca didn’t reveal any information about the possible side effect except to call it “a potentially unexplained illness.” The health news site STAT first reported the pause in testing, saying the possible side effect occurred in the United Kingdom.
An AstraZeneca spokesperson confirmed the pause in vaccinations covers studies in the U.S. and other countries.
Late last month, AstraZeneca began recruiting 30,000 people in the U.S. for its largest study of the vaccine. It also is testing the vaccine, developed by Oxford University, in thousands of people in Britain, and in smaller studies in Brazil and South Africa.