How do b cells fight infection?

Make antibodies!: B-cells make antibodies against foreign invaders. The antibodies stick to the invader, leading t cells to kill it. B cells are also the "memory" of the immune system. If the same invader comes along years later, the b cells that made antibodies the first time are ready to make them again. Finally, b cells send out chemical signals that tell other immune cells what to do. B is for bossy...