Katelyn Jetelina
Katelyn Jetelina is an epidemiologist and the founder of Your Local Epidemiologist, translating public health research into clear, useful newsletters for everyday decisions.
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Katelyn’s happenings, collected from public sources, plus her backstory and Starbook, where fans write.
Known for
Substack
YaleOverview
- Also known as
- Your Local Epidemiologist (YLE)
- Work
- Epidemiologist, newsletter founder, and science communicator
- Started YLE
- March 2020, with pandemic updates for a university community
- Education
- MPH and PhD in epidemiology and biostatistics, University of Texas Health Science Center at Houston
- Teaching
- Adjunct epidemiology professor, Yale School of Public Health
Mini bio
How it started.
In March 2020, while teaching at the University of Texas, Katelyn began sending pandemic updates to faculty, staff, and students. A student asked her to put the emails on Facebook so they could be shared with family and friends. Those updates became Your Local Epidemiologist.
Finding her audience.
The newsletter grew around a clear purpose: making complicated public health research understandable and useful. It expanded beyond COVID-19 into nutrition, emerging research, health rumors, and other questions readers encounter in daily life.
Beyond the inbox.
Katelyn is now YLE’s founder and CEO, an adjunct professor at Yale School of Public Health, and a co-founder of Healthier Together. She previously advised the White House and CDC. At Yale, she co-teaches public health communication with Naria Halliwell, helping students turn research into messages for real audiences.
Going local.
Her team has extended YLE into regional newsletters. In October 2026, she announced that its New York coverage would expand to the Northeast, following the addition of a California edition in 2025.
Creditschronological, newest first
Newsletters and collaborations
- 2026Your guide to fall 2026 vaccinesCo-author with Edward Nirenberg
- 2026The revolutionary art of fixing the thing people are complaining aboutCo-author with Chelsea Cipriano
- 2020–presentYour Local EpidemiologistFounder and CEO
Teaching and appearances
- 2026Navigating the Media Landscape for Maximum Public Health ImpactCo-teacher with Naria Halliwell
- 2026STAT Summit 2026Featured speaker in conversation with Rick Berke
- 2025Health & Veritas, episode 184Guest
- 2025SUNY Upstate Medical University commencementCommencement speaker and honorary degree recipient
Awards
Quotes
We need to meet people where they’re at.Katelyn Jetelina, Yale Leaders in Public Health lecture
During her December 11, 2023 Yale visit, she urged public health professionals to respond to people’s questions quickly and with empathy.
Trivia
- YLE’s name came from the way she signed her early university emails: “Love, Your Local Epidemiologist.”
- She initially expected to write the pandemic updates for only about six weeks.
- Her research background includes violence prevention, child welfare, and mental health.
- She describes herself as a wife and mom to two daughters on YLE’s About page.
Find Katelyn
Follow Katelyn for clear public health updates and the stories behind YLE.
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