| CI | confidence interval |
| COVID-19 | severe acute respiratory syndrome coronavirus 2 disease |
| ECOG PS | Eastern Cooperative Oncology Group Performance Status |
| ICIs | immune checkpoint inhibitors |
| mRNA | messenger RNA |
| OR | odds ratio |
| SARS-CoV-2 | severe acute respiratory syndrome coronavirus 2 |
| SPSS | Statistical Package for Social Science |
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