Although we recognize that certain COVID-19 sequelae—including, for instance, fatigue—may overlap with symptoms stemming from the underlying malignancy, previous studies have shown CRP to be reproducibly associated with respiratory impairment (21) and with COVID-19 severity in non–intensive care unit hospitalized patients (22), highlighting a mechanistic link following SARS-CoV-2 infection. This evidence concerns the gene CRP and COVID-19.