Daring Cell Defenders

Bacteria and viruses are all around you. If they get inside your body they canmake you very sick. Fortunately your body is built to keep illnesscausinginvaders ... » 

Bacteria and viruses are all around you. If they get inside your body they canmake you very sick. Fortunately your body is built to keep illnesscausinginvaders out. If some do get in special cells inside your body come to therescue. They track down and destroy anything that might cause you harm. See howthe daring cell defenders that make up your immune system keep you healthy. Areyou ready for this microquest? «