inclusion criteria * age ≥18 to 65 years. and * proven infection with sars-cov-2, defined as detection of sars-cov-2 by rt-pcr from nasopharyngeal swab or lower respiratory tract specimen and * hospitalized at the time of enrollment and * hla matched family related donor with recent sars-cov-2 infection is at least 10 days out from symptom onset. a negative result for covid-19 by a diagnostic test is not necessary to qualify the donor and * in stage i or ii of disease (mild or moderate) at the time of enrollment (table 1) and * one of the following high-risk conditions: * chronic lung disease not requiring oxygen at home prior to admission (including but not limited to copd, cystic fibrosis, asthma and sickle cell disease); underlying heart disease (including hypertension); patients with an acute myocardial infarction within the last 3 months will require cardiology clearance prior to enrollment; diabetes mellitus (type i or ii) ; obesity (bmi ≥ 30); immunosuppressed, based on investigator's assessment.

inclusion criteria * age ≥18 to 65 years. and * proven infection with sars-cov-2, defined as detection of sars-cov-2 by rt-pcr from nasopharyngeal swab or lower respiratory tract specimen and * hospitalized at the time of enrollment and * hla matched family related donor with recent sars-cov-2 infection is at least 10 days out from symptom onset. a negative result for covid-19 by a diagnostic test is not necessary to qualify the donor and * in stage i or ii of disease (mild or moderate) at the time of enrollment (table 1) and * one of the following high-risk conditions: * chronic lung disease not requiring oxygen at home prior to admission (including but not limited to copd, cystic fibrosis, asthma and sickle cell disease); underlying heart disease (including hypertension); patients with an acute myocardial infarction within the last 3 months will require cardiology clearance prior to enrollment; diabetes mellitus (type i or ii) ; obesity (bmi ≥ 30); immunosuppressed, based on investigator's assessment.

inclusion criteria - age ≥18 to 65 years. and - proven infection with sars-cov-2, defined as detection of sars-cov-2 by rt-pcr from nasopharyngeal swab or lower respiratory tract specimen and - hospitalized at the time of enrollment and - hla matched family related donor with recent sars-cov-2 infection is at least 10 days out from symptom onset. a negative result for covid-19 by a diagnostic test is not necessary to qualify the donor and - in stage i or ii of disease (mild or moderate) at the time of enrollment (table 1) and - one of the following high-risk conditions: - chronic lung disease not requiring oxygen at home prior to admission (including but not limited to copd, cystic fibrosis, asthma and sickle cell disease); underlying heart disease (including hypertension); patients with an acute myocardial infarction within the last 3 months will require cardiology clearance prior to enrollment; diabetes mellitus (type i or ii) ; obesity (bmi ≥ 30); immunosuppressed, based on investigator's assessment.

inclusion criteria - age ≥18 to 65 years. and - proven infection with sars-cov-2, defined as detection of sars-cov-2 by rt-pcr from nasopharyngeal swab or lower respiratory tract specimen and - hospitalized at the time of enrollment and - hla matched family related donor with recent sars-cov-2 infection is at least 10 days out from symptom onset. a negative result for covid-19 by a diagnostic test is not necessary to qualify the donor and - in stage i or ii of disease (mild or moderate) at the time of enrollment (table 1) and - one of the following high-risk conditions: - chronic lung disease not requiring oxygen at home prior to admission (including but not limited to copd, cystic fibrosis, asthma and sickle cell disease); underlying heart disease (including hypertension); patients with an acute myocardial infarction within the last 3 months will require cardiology clearance prior to enrollment; diabetes mellitus (type i or ii) ; obesity (bmi ≥ 30); immunosuppressed, based on investigator's assessment.