SCARB1 and infectious otitis media: MDSCs are bone marrow‐derived inhibitory cells, precursors of dendritic cells, macrophages, and granulocytes, and we found that the levels of TAM, M‐MDSCs, and G‐MDSCs in AOM/DSS + SR‐B1−/+ mice were significantly reduced compared with AOM/DSS mice (p < 0.05), indicating that AOM/DSS + SR‐B1−/+ mice reduced the ability to suppress immune cell responses.