IgM antibody purification is a process used to isolate Immunoglobulin M (IgM) antibodies from serum, plasma, or cell culture supernatants for various research and diagnostic applications. IgM antibodies are the first line of defense in the immune response and play a crucial role in the early stages of infections. Purifying IgM antibodies is important for studying their properties, applications in diagnostics, or for therapeutic purposes.