Memory B Cells are a type of white blood cell that play a crucial role in the immune system. They are formed after the body encounters a pathogen, such as a virus or bacteria. Once activated, these cells remember the specific antigens of the pathogen, allowing for a faster and more effective response if the body encounters the same pathogen again in the future. When Memory B Cells recognize a familiar pathogen, they quickly produce antibodies tailored to that specific invader. This rapid response helps the body to eliminate the pathogen more efficiently, providing long-lasting immunity and protection against future infections.