HMGB1 and COVID-19: If children belonging to the post COVID-19 group are categorized into symptomatic (n = 10) and asymptomatic (n = 10) patients, based on the symptoms that they had during the SARS-CoV2 infection, we found no difference in the HMGB1 level (545.90 DU (range: 369.90–701.71) vs. 510.18 DU (range: 356.00 – 870.48), p = 0.450).