On the contrary, cellular immunity data indicates that COVID-19 convalescent HD patients exhibit higher frequencies of SARS-CoV-2 reactive memory T cells (CD4+CD154+CD137+) that express IFN-γ and IL-2 in comparison to patients with normal kidney function, although this increase did not reach statistically significance in a single time-point observational case-control study (8). Here, CD4 is linked to Huntington disease.