Among PLWH who were naive to COVID-19 at study entry, we observed a weak positive correlation between the most recent CD4+ T-cell count and antibody concentration after one dose that was not statistically significant (Spearman’s ρ = 0.18, p = 0.09), but no significant relationship at either time point after the second dose (Fig. 1e). The gene discussed is CD4; the disease is COVID-19.