According to the Pittsburgh Tribune-Review,

In a scathing analysis published March 29 on Medium, “A Call to Honesty in Pandemic Modeling,” Pegden and Chikina assert that many of the popular models being cited by national media and President Trump are misleading. Pegden is an associate professor of mathematics at Carnegie Mellon University and Chikina is an assistant professor of molecular biology at the University of Pittsburgh; they are a married couple.