immunoglobulin M

Immunoglobulin M (IgM) is a type of antibody produced by the immune system to fight infections. It is the first antibody generated when the body encounters a new pathogen, such as bacteria or viruses, helping to quickly recognize and neutralize the threat. IgM is primarily found in the blood and lymph fluid and plays a key role in the body's early immune response. Its structure allows it to effectively bind to multiple antigens at once, making it highly efficient in initial defense. Over time, the body produces other types of antibodies for long-term immunity, but IgM is crucial for immediate protection.