There are multiple types of immune cells in the body which respond to disease and infection. T cells are a type of cell population. T cells are in charge of eliminating pathogenic germs that have made their way into the body. Most therapies in the last decade have focused on T cells to combat disease, including cancer. However, other cells play a critical role in the immune system. B cells are one cell subset that impact the body’s defense against disease. They have three distinct responsibilities: