ACE2 and HIV infectious disease: In multivariable analyses, HIV infection remained significantly associated with an adjusted 11% lower ACE2 displacement activity after one vaccine dose (p = 0.023), with male sex (adjusted ~7% lower activity compared to female sex, p = 0.031) and having received ChAdOx1 as the first dose (adjusted 18.8% lower activity compared to an mRNA vaccine as first dose, p = 0.0001) remaining additional independent predictors of lower ACE2 displacement activity.