COVID-19(80) Patient(65) SARS-CoV-2(63) therapy(39) Treatment(36) Cancer(34) Result(34) supplementary material(33) vaccination(31) Analysis(26) reported(26) analyzed(25) SARS-COV-2 infection(25) Infection(23) coronavirus disease(23) leukemia(22) patients(21) risk(21) outcome(21) Mortality(20) Vaccine(19) hematological(19) BNT162b2(19) age(19) cancer patient(19) COVID-19 patient(19) Efficacy(18) majority(18) significantly(17) median(17)