A BLOOD-PUMPING JOB Strep throat! Hay fever! Influenza! The world is a dangerous place for a red blood cell just trying to get her deliveries finished. Fortunately， she’s not alone… she’s got a whole human body’s worth of cells ready to help out! The mysterious white blood cell， the buff and brash killer T cell， the nerdy neuron， even the cute little platelets ? everyone’s got to come together if they want to keep you healthy!