How Vaccines Train Your Blood

Iris Fennimore

A tiny spy slips into your blood and teaches your body to build an army against forgotten foes waiting in the shadows. Iris Fennimore turns the science of immunity into a secret-agent adventure for curious kids around six to ten, with hidden libraries, daring trials, and one very important arrival. Duncan Winslow reads it like a patient older sibling sharing something genuinely cool, keeping the facts clear and the stakes exciting without ever talking down.