cohorts of patients(1) Disease progression(1) recovering from COVID-19(1) First wave(1) Analysis(1) Treatment outcomes.(1) general condition(1) Effect(1) COVID-19 pandemic(1) less(1) outcome(1) patients died(1) Follow-up(1) retrospective(1) Radiation(1) significant difference(1) positive(1) Treatment(1) clinically(1) Comorbidities(1) effect of treatment(1) Radiotherapy(1) Care(1) COVID-19 patient(1) Observational cohort study(1) fraction(1) reported(1) Cancer(1) impacted(1) outcomes(1)