PLK1 and Huntington disease: Increased expression of ‘LI.M4.2 PLK1 signaling events’ at V2D7 compared to V2D0, which was the only enriched module at this time point for HD subjects with no SARS-CoV-2 history, was predictive of higher anti-spike IgG at both V2D7 and M6 (p<0.05).