Long COVID-19 Rehabilitation & Recovery Research Program

Inclusion Criteria: * Long COVID-19 Infection (Documented by PCR or patient report) * Age \>= 18 years old. * At least 12 weeks since the initial COVID Infection. * One or more of the following symptom/signs: Fatigue, Dyspnea, Exercise Intolerance, Post Exertional Malaise and/or Difficulty Breathing. * Able to perform a cardiopulmonary exercise test. Exclusion Criteria: * Patients is not able to perform technically acceptable pulmonary function tests and symptom-limited cardiopulmonary cycle ergometry tests. * Patients who desaturate to SpO2 \<80% on screening incremental exercise testing. * Patients who have completed a pulmonary rehabilitation program in the six weeks prior to the screening visit or patients who are currently in a pulmonary rehabilitation program. * Patients who have taken an investigational drug within one month or six half-lives (whichever is greater) prior to screening visit (Visit 1). * Pregnant or nursing women. * Women of childbearing potential who are not using a highly effective method of birth control. Female patients will be considered of childbearing potential unless surgically sterilized by hysterectomy or bilateral tubal ligation, or post-menopausal for at least two years. * Patients who are currently participating in another interventional study. * Malignancy for which the patient has undergone resection, radiation therapy, or chemotherapy within the last 2 years * Any other significant disease than COVID-19 which, in the opinion of the investigator, may i) put the patient at risk because of participation in the study, ii) influence the results of the study (e.g. Insulin or testosterone therapy, systemic corticosteroids, HIV, etc), iii) cause concern regarding the patient's ability to participate in the study.