Persistent manifestation of neurological long COVID correlated with enhanced CD8+ T cell responses to membrane (N) but not spike (S) viral proteins compared to complete convalescence at 6 months post infection [41], whereas post-acute expansion of new SARS-CoV-2-specific CD4+ and cytotoxic CD8+ T cell clones was associated with gastrointestinal (GI) long COVID [42]. The gene discussed is CD4; the disease is infection.