What protects you from viruses and bacteria that threaten your body everyday? Why is that a friend catches a cold and you don't if you are in the same environment? Learn about immunity and how your immune system works through this comprehensive but age-appropriate study tool. Train little doctors by introducing concepts most kids their age won't fully understand yet.
What protects you from viruses and bacteria that threaten your body everyday? Why is that a friend catches a cold and you don't if you are in the same environment? Learn about immunity and how your immune system works through this comprehensive but age-appropriate study tool. Train little doctors by introducing concepts most kids their age won't fully understand yet.
