COVID-19(2) Result(2) age(2) analyzed(2) Patient(2) was performed(1) Blood donors(1) COVID-19 patient(1) participant(1) male(1) The United States(1) Precaution(1) criteria(1) include(1) hospital(1) maximum(1) expired(1) China(1) lack(1) antibody(1) Older age(1) evaluated(1) Laboratory(1) patients(1) ICU care(1) Asymptomatic(1) laboratory-confirmed(1) General population(1) Blood(1) Mortality(1)