CCL2 and congenital rubella syndrome: sHLH is hallmarked by CRS and multiorgan failure with high concentrations of ferritin and additional cytokines such as IL-18, IFN-γ inducible protein 10 (IP10), monocyte chemoattractant protein 1 (MCP1), and macrophage inflammatory protein 1β (MIP1β) [70, 71].