Active EMNet Projects

This page lists all active EMNet projects as of March 2021. To view the Studies timeline, please click here. Additionally, publications can be found here.

Multicenter Airway Research Collaboration

MARC-35 (also known as the WIND Study) is a multicenter, prospective cohort study of severe bronchiolitis and risk of recurrent wheezing.

Click here to learn more about MARC-35.

MARC-43 (also known as the CHIME Study) is a multicenter, prospective cohort study of healthy infants’ respiratory microbiome.

Click here to learn more about MARC-43.

The NIH Environmental Influences on Child Health Outcomes (ECHO) Program was initiated in 2016 with a mission “to enhance the health of children for generations to come.”

Click here to learn more about the ECHO Program.

The Human Epidemiology and Response to SARS-CoV-2 (HEROS) study was initiated in Spring 2020 during the early months of the COVID-19 pandemic. The main objectives were to help determine the rate of SARS-CoV-2 infection in children and their family members, and to determine what percentage of infected children have symptoms.

Click here to learn more about the HEROS study.

The mission of EMNet’s Translation Research Unit is to leverage large clinical, biometrics, and omics data not only to delineate disease pathobiology (e.g., that of bronchiolitis and childhood asthma) but also to transform medical care in the U.S. and around the world.

For more information, click here.

Health Services Research

EMNet is once again performing its seventh annual national survey to better understand the nature of U.S. emergency departments (EDs). Briefly, we are contacting hospitals to obtain basic information about their EDs.

The results from this national survey will be used to perform health services research on U.S. emergency care and to enhance our existing app, findERnow (available for free on both iPhone and Android smartphones). If you have questions or would like more information, please email us at

To complete the survey, click here.

To learn more about NEDI-USA 2021, click here.

EMNet’s ED workforce studies estimate the supply and demand of emergency medicine physicians and advance practice providers.

For more information, click here.

The goals of EMNet’s EMS workforce studies are three-fold: 1) to describe patterns of the EMS workforce; 2) to identify and define the occupational health and safety risks of EMS personnel; and 3) to understand the care EMS provides in the prehospital setting, particularly for obstetric events and out-of-hospital cardiac arrest.

For more information, click here.

EMNet investigators are investigating the role of telehealth in emergency care, both regionally and nationally. Recent studies are exploring the role of telehealth in pediatric emergencies and mental health emergencies; we also are investigating barriers (and solutions) for the use of telehealth in rural EDs.

For more information, click here.

Social Emergency Medicine

Current projects focus around understanding neighborhood and spatial risk, evaluating and developing directories of community resources, and identification of social risk and social need.

For more information, click here.

Administrative Datasets

Large administrative dataset analyses contribute to all three research programs at EMNet.

To learn more about these diverse analyses, please click here.