Kizzmekia Corbett spent her life preparing for this moment. Can she create the vaccine to end a pandemic?

Halfway through the school year, Myrtis Bradsher found herself paying close attention to a little girl called Kizzy. She always looked sharp, with ribbons knotted to her ponytails and socks that matched every outfit. But it was the way she rushed to help other fourth-graders with classwork that really stood out. “She had so much knowledge,” the teacher recalled. “She knew something about everything.”

In 25 years at Oak Lane Elementary School in rural Hurdle Mills, N.C., Bradsher had not seen a child like her. Bradsher was one of a few black teachers, and Kizzy was a rare black student. At a parent-teacher conference, Bradsher pushed to give the girl the advantages she felt she deserved. “Look,” she recalled saying to her mother, Rhonda Brooks, “she’s so far above other children. We need to send her to a class for exceptional students. I need you to say we have your permission.”