John B. Little Center for Radiation Sciences
The JBL Center supports cutting edge biological, physical, and population-based epidemiological research to understand, interpret, and estimate the health effects of radiation to pave the way for effective preventive and therapeutic strategies.
665 Huntington Ave, |
Boston, MA 02115
JBL Symposium XXVIII – 2025

“The Spectrum of Exposure: Radiation from Routine to Rare Events“
Friday, October 24, 2025, 1PM-5PM in Kresge Auditorium at the Harvard T.H. Chan School of Public Health with poster session and reception immediately following.
The JBL Center for Radiation Sciences is pleased to host this year’s JBL Symposium at Harvard TH Chan School of Public Health.
The title of this year’s Symposium is “The Spectrum of Exposure: Radiation from Routine to Rare Events” and will be held in the afternoon on Friday, October 24th, 2025, at the Harvard TH Chan School of Public Health in Boston, Massachusetts. The Symposium will feature talks by leading investigators whose research is focused on understanding how exposure to ionizing radiation in various environments affects our health.
This annual event, initiated by the late Dr. Jack Little and held at the Harvard School of Public Health for 29 years, seeks to foster the dissemination of information and interaction between scientists working in fields related to radiation sciences.
Please register to attend by visiting JBL Symposium Registration.
Program
1:00–1:05 PM: Welcome
- Petros Koutrakis, PhD; Zachary Nagel, PhD; and Kristopher Sarosiek, PhD
Hosts of the John B. Little Symposium
1:05–1:10 PM: Opening Remarks
- Dean Andrea Baccarelli
Dean of the Harvard T.H. Chan School of Public Health
1:10 – 1:20 PM: Introduction to “The Spectrum of Exposures”
- Kristopher Sarosiek, PhD
Co-Director John B. Little Center for Radiation Sciences Department of Environmental Health
Harvard T.H. Chan School of Public Health
1:20–2:05 PM: From Tragedy to Hope: Science at the 80th Anniversary of the Atomic Bombings
- Jonathan Samet, PhD
Professor, Former Dean, Department of Environmental & Occupational Health
Colorado School of Public Health
2:05 – 2:50 PM: Radiation and Health Across Decades: What Fluoroscopy and Chornobyl Studies Reveal About Long-Term Health Effects of Radiation Exposures
- Lydia Zablotska, PhD
Salvatore Pablo Lucia Chair in Preventive Medicine
Professor in Residence, Department of Epidemiology and Biostatistics
UCSF Helen Diller Family Comprehensive Cancer Center
2:50 – 3:15 PM: Coffee Break and Poster Setup
3:15 – 3:40 PM: Environmental Ionizing Radiation Exposure and Health: New Insights from Population-Based Research
- Petros Koutrakis, PhD
Professor of Environmental Sciences, Department of Environmental Health
Harvard T.H. Chan School of Public Health
3:40 – 4:25 PM: Living with Uncertainty about Low-dose Radiation Risks
- David Brenner, PhD
Higgins Professor of Radiation Biophysics (in Radiation Oncology) and of Environmental Health Sciences
Columbia University Medical Center
4:25 – 4:40 PM: The Health Legacy of the Atomic Bomb in St. Louis, Missouri: Radiation contamination and cancer
- Marc Weisskopf, PhD
Cecil K. and Philip Drinker Professor of Environmental Epidemiology and Physiology
Harvard T.H. Chan School of Public Health
4:40 – 4:50 PM: What We’ve Learned about “The Spectrum of Exposures”
- Zachary Nagel, PhD
Co-Director John B. Little Center for Radiation Sciences Department of Environmental Health
Harvard T.H. Chan School of Public Health
4:50 – 5:00 PM: Closing
- Petros Koutrakis, PhD; Zachary Nagel, PhD; and Kristopher Sarosiek, PhD
Hosts of the John B. Little Symposium
5:00 – 6:30 PM: Reception & Poster Session
- If you’d like to present a poster at this Symposium, please complete this JBL Symposium Poster Presentation Request.
6:00 PM: Announcement of Poster Presentation Winners
Poster Session
If you’d like to present a poster at this Symposium, please complete this JBL Symposium Poster Presentation Request.
2024 Highlights




