MBL2 and viral infectious disease: The innate immune response to SARS-CoV-2 Antiviral innate immunity has several humoral components, including mannose-binding lectin, interferons, chemokines, B lymphocytes, natural killer cells, and other innate lymphoid cells (ILCs) and gamma delta T cells, which generally limit the spread of viral infection by cytotoxic action on target cells, cytokine production, and induction of an adaptive response [29].