Can you catch the same cold twice? Elementary and middle schoolers learn about what happens when a virus attacks their bodies, and how the immune system never forgets a virus, with an entertaining comic book. The packet includes...

This complete resource provides a thorough discussion of the immune system. Topics include the non-specific defense mechanism, specific defense mechanism, humoral immune system, cell-mediated immune system, and more.

Antibodies, also called immunoglobulins, are proteins manufactured by the body that help fight against foreign substances called antigens. When antigens enters the body, it stimulates the immune system to produce antibodies. (The immune...