Concentrations of IgG antibodies against the RBD of the spike protein were found with lower concentrations early (1–2 months), with similar concentrations later (3–4 months) and with lower concentrations after vaccination late (≥ 5 months) after COVID-19 in OLT convalescents compared to non-IS-Con (Fig 3C). Here, CHMP5 is linked to COVID-19.