What Is the Snowball Study?

The Snowball Study is testing ways to identify and contact people who may have been exposed to infection by a virus such as SARS-CoV-2 (also known as coronavirus, or COVID-19). The study is led by researchers and physicians at Duke University.

If you have a Snowball Study “coupon code” and are interested in participating, click the button below, or keep reading to learn more about Snowball. Only people who have been invited to participate in Snowball and have received a coupon code can enroll.

How Does the Snowball Study Work?


The Snowball study uses a person’s social ties – the people they live, work, and spend time with – to trace the spread of respiratory diseases caused by viruses.


Why Are We Doing This Study?

The Snowball Study is intended to help identify people who have been infected with SARS-CoV-2 but don’t yet know it, and to learn about social activities and behaviors that affect the transmission.

Who Can Take Part in the Snowball Study?


The Snowball Study is most interested in finding people who are infected with SARS-CoV-2, also called COVID-19 or the coronavirus, but who don’t know yet that they are infected.



If you have any questions or would like to learn more about the Snowball study, please contact the Clinical Research Coordinator at 919-613-1239.

You can also email the Clinical Research Coordinator and the Snowball study principal investigator, Dr. Dana Pasquale, at snowball@duke.edu.