IL6 and infection: However, in COVID-19, the meta-analysis showed IL‐6 levels of 36.7 pg/mL (95% confidence interval [CI] 21.6–62.3 pg/mL) in severe patients, representing levels markedly lower than those seen in infection diseases such as septic shock (983.6 pg/mL, 95% CI 550.1–1758.4 pg/mL)54.