PRRT2 and COVID-19: Within the germicidal lamp-related PKC subgroup, the mean ages were 39.20 ± 3.69 years (range, 31–51 years) and 42.73 ± 3.88 years (range, 21–78 years) before and after COVID-19 began, respectively, and no significant differences in age or gender were detected between the groups (Table 2).