December 30, 2021 https://healthsciences.arizona.edu/newsroom/news-releases/2021/covid-19-vaccine… UArizona Health Sciences The Pfizer-BioNTech vaccine is 92% effective at preventing COVID-19 in children between the ages of 12 and 17, according to data from an ongoing population study led by researchers at the University of Arizona Health Sciences. Related Improving Health Related Researchers Jefferey L Burgess Janko Nikolich-Zugich Edward John Bedrick Purnima Madhivanan Xiaoxiao Sun