IL6 and COVID-19: We found, as expected, that IL-6 levels in the COVID-19/Self-RPD+ group (26.8 pg/mL ± 43.4 pg/mL) were significantly higher than those in the COVID-19 only and Self-RPD+ groups (22.7 pg/mL ± 29.1 pg/mL and 16.6 pg/mL ± 14.9 pg/mL, respectively).