* Includes sample testing across the population without respect to reported symptoms or potential contact with others who might be COVID-19 positive.

# Includes all tests conducted on those reporting symptoms consistent with potential COVID-19 infection, and on those who may have been in close contact with others who might be COVID-19 positive.

+ Precautionary Quarantine includes individuals who have been identified through contact tracing or who have voluntarily reported they are quarantining due to symptoms, possible exposure, travel or family circumstances.

Does not include testing of student athletes who returned to campus in July 2020, before the survey testing program was launched. Duke previously reported that 26 student-athletes tested positive for COVID-19. All went through the required isolation and were cleared to return to their daily activities.