marker(5) SARS-CoV-2(5) mortality risk(5) vaccination(5) acute respiratory syndrome(5) COVID-19 pandemic(5) perturbations(5) COVID(5) heterogeneous nature(5) Research(5) T-cell receptor(5) scar(5) Epigenetic(5) COVID-19(5) accumulated(5) SjTREC(5) Corona virus(5) life style(5) aging(5) all-cause mortality(5) Forensic(5) Modification(5) persistence(5) Alter(5) age(5) respiratory(5) individuals(5) DNA methylation markers(5) pathology(5) Immune cell(5)