Especially given how quickly we are trying to develop a COVID-19 vaccine, it’s a good sign that the AstraZeneca trial paused to investigate an unexplained illness, commented Susan Ellenberg, PhD.

Susan Ellenberg, PhD, comments on the state of COVID-19 vaccine development: She hopes people are reassured by the AstraZeneca trial's pause for safety and says it's unlikely that we’ll have a vaccine this fall.