CCL4 and influenza: Recruiting chemokines, including CCL2/MCP-1, CXCL10/IP-10, CCL3/MIP-1α, and CCL4/MIP-1β, were strongly induced, consistent with epithelial-driven recruitment of monocytes, and leucocytes during influenza infection73–76, mirroring early chemotactic signals seen in murine influenza bronchoalveolar lavage fluid (BALF) studies77.