Furthermore, while ApoE-ɛ4 genotype is associated with severe initial COVID-19 disease and an increased risk of future cognitive decline (MacAulay et al., 2020; Safdari Lord et al., 2022), we did not find that neuropsychological test scores were associated with ApoE-ɛ4 carrier status. The gene discussed is APOE; the disease is Mental deterioration.