Pediatric COVID Outcomes Study (PECOS)

This is a multisite prospective observational study to evaluate the clinical sequelae of symptomatic and asymptomatic severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection in the pediatric population, including coronavirus disease 2019 (COVID-19) and multisystem inflammatory syndrome in children (MIS-C), and characterize the immune response associated with these clinical presentations. Participants aged 21 years and younger with laboratory confirmed history of symptomatic or asymptomatic SARS-CoV-2 infection will visit the study sites for clinical and research evaluations and sample collection at schedules dependent on time since infection. Participants enrolled within 12 weeks after acute infection or positive test will be part of the "recovery group" and will attend study visits at baseline, every 3 months for the first 6 months, and subsequently every 6 months for a total of 3 years. Participants enrolled more than 12 weeks after acute infection or positive test will be in the "convalescent group" and will attend study visits at baseline and subsequently every 6 months for a total of 3 years. Individuals (aged ≤21 years) without a diagnosis of SARS-CoV-2 infection or current symptoms suggestive of COVID-19 will serve as a control group and will attend visits for evaluations and sample collection at baseline and every 12 months for a total of 3 years. This protocol will establish a cohort of pediatric patients recovered from SARS CoV-2 infection and a biorepository for evaluation of the potential roles of host genetics, immune response, and other possible factors influencing long-term outcomes. Parents or guardians of participants in all cohorts will also be enrolled for limited participation to complete questionnaires about how the family is impacted by the participant's health and SARS-CoV-2.