Inclusion Criteria:  Patients aged 5 years and older recovering from COVID-19 infection. For EndoPAT assessment-at least 3 months since the patient was diagnosed with COVID -19 infection or with PIMS  Exclusion Criteria:  Cardiac or pulmonary comorbidity other than COVID-19 related morbidity. Inability to perform all study assessments. If a patient will be able to complete one of the assessments or more, the data will be collected and included in the analysis. Intercurrent systemic conditions or illness and/or medication use that could affect cardiopulmonary exercise capacity or EndoPAT™.