(CNN) As US health authorities consider whether to allow AstraZeneca to resume the clinical trial of its coronavirus vaccine, crucial questions remain about neurological illnesses suffered by study participants who received injections of the experimental vaccine. Krumholz and other scientists said the nature of the participants' neurological illnesses matter. Mark Slifka, an immunologist, said it's particularly concerning because information posted on Oxford's website said both participants suffered neurological illnesses. The clinical trial for AstraZeneca's coronavirus vaccine has already resumed in other countries, including the UK. Spokespersons for the University of Oxford and AstraZeneca spokespersons declined to answer specific questions about varying accounts of the participants' illnesses.

Source: CNN September 25, 2020 13:18 UTC