Grumpy Old Geeks People Katelyn Jetelina Person Katelyn Jetelina 2 mentions in 1 episode An epidemiologist whose post about guidance for vaccinated people was shared by a host. Mentions 499: Forever Old Mar 17, 2021 1:29 your local epidemiologist page, Dr. Caitlin Jetlina 1:47 She has a PhD in epidemiology and biostatistics