ELISA results regarding COVID-19 recovered (PCR-positive) people’s sera reactivity also provides strong support for this methodology since many HLA-DRβ1* allele-related peptides (also regarding monkey immunisation) were included in these trials to select the best one for a particular/target allele or to cover minimal allele variations in different ethnic groups. The gene discussed is HLA-DRB1; the disease is COVID-19.