IL10 and COVID-19: Anti-inflammatory cytokines, such as IL-10, showed a downward trend in unvaccinated patients with COVID-19, compared with those in patients with COVID-19 who had been vaccinated; however, the difference was not statistically significant (5.15 [3.93–6.34) pg/mL vs. 5.80 [4.20–7.20] pg/mL, P = 0.345).