Human Exposure Assessment Lab (HEAL)

Exposure science examines the ways in which individuals encounter and are exposed to physical, chemical, biological and other stressors in both general environments and workplaces. Within epidemiology, exposure assessment is crucial to identify specific exposure agents and determine their impact on mortality/morbidity across varying populations—be it a community, city, state or country.

The Human Exposure Assessment Lab (HEAL) is dedicated to precisely measuring the exposure of populations to both chemical and non-chemical stressors across time and space, as well as discerning the subsequent effects on health. Furthermore, HEAL is committed to devising and enacting evidence-driven interventions aimed at mitigating these exposures, particularly among at-risk populations in Philadelphia, USA, and beyond.

Director

  • Profile Picture of Inkyu Han

    Inkyu Han

    • College of Public Health

      • Epidemiology and Biostatistics

        • Associate Professor

Current Research Projects

ELSA Study (Estudio de Limpiadoras en San Antonio): R01ES031063 (Active)

The ELSA study is a community-engaged project to characterize individual, work-related, and neighborhood-level determinants of longitudinally-measured total personal air exposure to a suite of volatile organic compounds (VOCs) among an overburdened group of Hispanic women in San Antonio, Texas, and to understand the impact of these exposures on biomarkers of early respiratory health effects.

Project period: 3/1/2021–12/31/2024

CAMP Study (Characterizing Airborne Microplastics in Philadelphia): R21ES034438 (Active)

The CAMP study investigates the presence of airborne microplastics and nanoplastics in Philadelphia, aiming to pinpoint potential urban sources of these particles across diverse neighborhoods. This innovative research employs a combination of intensive on-site environmental sampling, state-of-the-art analytical techniques, and geospatial data interpretation. This study will characterize the forms, varieties, and levels of microplastics and nanoplastics present in the atmosphere.

Project period: 6/18/2023–5/31/2025

MELD Study (Microplastics Exposure in the Laundry and Dry-cleaning Industry): R21OH012595 (Active)

The MELD study will investigate the impact of key factors—work hazards, workplace characteristics, and workforce details—on the inhalation exposure to microplastics in the laundry and dry-cleaning industry. The findings from this study will guide future intervention studies and training programs, aimed at mitigating microplastic exposure among workers in this industry.

Project period: 9/30/2023–9/29/2025

Cool Wave— PRCCEH (Active)

Cool Wave—Strengthening Community Capacity to Mitigate Urban Heat Exposure and Protect Children's Health in Philadelphia: PRCCEH (Active)

This study aims to translate scientific findings into practical measures for reducing residential heat exposure, particularly through the use of electric fans. We will distribute 240 fans to families living in neighborhoods highly vulnerable to heat. The study will assess the effectiveness of these fans in mitigating indoor heat exposure in homes. Additionally, we will use community forums to disseminate our results. This will aid in developing future strategies for implementing and evaluating public health action plans, grounded in multilevel and behavioral science theories.

Project period: 12/1/2023–11/30/2024

Nighttime Heat Exposure and Behavior Adaptation: R21ES035188 (Active)

To gain insight into the combined effects of individual behaviors, built environment, and nighttime heat exposure on heat adaptation behavior in residential houses, we will establish a Community Advisory Board, comprising local residents and academic researchers; examine the collective impact of indoor home heat exposure, individual attributes, and built environment factors on individual-level heat adaptation behavior; and provide guidance on effective heat adaptation strategies to community leaders and vulnerable residents.

Project period: 1/16/2024–12/31/2025