This is a prospective, observational study of COVID-19 surveillance and exposure testing in school communities. Participating school communities are providing severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) tests to students and staff at their schools per school, local, and national guidelines. This study will combine data received from the schools with data collected directly from participants to guide analysis of the co-primary objectives. Participants will be grouped into two different cohorts, depending on each school's SARS-CoV-2 test administration practices.

Surveillance Cohort: Schools participating in this cohort will be performing surveillance testing weekly on approximately 10-20% of students and 100% of staff.

Exposure Cohort: Schools participating in this cohort will be performing exposure testing on students and staff who have been identified as having close contact with school members diagnosed with SARS-CoV-2 infection.

Inclusion Criteria:

• Data from all participating school communities will be included in this study (no inclusion/exclusion criteria will be assessed).

Exclusion Criteria:

• None

All students and staff who are members of participating school communities will be given the opportunity to consent to this study. Both children and adult school community members will be included in this study.