IL6 and COVID-19: When analyzing the COVID-19 patients age-related (cut-off median = 69 years) by dividing them into an older and younger subgroup, it has been shown that hs-CRP correlated significantly with MCP3 (r = 0.577), CCL23 (r = 0.542) and IL6 (r = 0.722, all p < 0.01) in younger COVID-19 patients.