It was March 2020 when Dr. Ajay Sethi got a call from his best friend in Maryland. His friend’s father had died from COVID-19, one of the earliest U.S. casualties of the virus.
“Because I’m an epidemiologist and I think about numbers, the emotions behind those numbers, how is it I know someone so early who’s died from COVID-19?” said Sethi, who serves as the faculty director of the School of Medicine and Public Health at the University of Wisconsin-Madison. “The odds are so unusual, I remember thinking then, it must be big.”