Explains how bacteria and viruses affect the human body and how the body fights them.

Sixteen-year-old old Kaelyn challenges her fears, finds a second chance at love, and fights to keep her family and friends safe as a deadly new virus devastates her island community.

Twelve-year-old Jack may be the Imagine Nation's only hope of fending off a new Rustov attack, with the help of his fellow superheroes-in-training, but the virus he carries, and Jonas's suspicions, provide new complications.

Reveals how Thomas and WICKED built the Maze against the backdrop of an apocalyptic world. The forests burned, the lakes and rivers dried up, and the oceans swelled. Then came a plague. Families died, violence reigned, and man killed man. Next came WICKED, who were looking for an answer. And then they found the perfect boy: Thomas, who built a maze. Now there are secrets. There are lies. And there are loyalties history could never have foreseen.

"A viral disease called 'the wickedness' plagues the world, and sixteen-year-olds Astrid and Natalie are two of the only people immune. The girls live in separate, isolated communities, but recent encounters with wicked people link their stories in unexpected ways"--

Esther and Caleb hit the road, leading a ragtag caravan. Their destination? A mythical city where they hope to find food and shelter ... not to mention a way to make it past age nineteen. On the way, alliances and romances blossom and fracture as the group faces vicious gangs, violent weather, and more variants. Esther must rally to take charge, accepting the help of a blind wilderness guide, Aras. He seems unbelievably cruel, but not everything is...

The discovery of a deadly virus being smuggled across the border pits FBI Special Agent James Mason and his strike force against an unknown adversary hell-bent on humanity's destruction. In a desperate effort to contain the pathogen, they launch a predawn raid, only to find that their enemy knows they're coming...and it's not about to be taken alive. An explosion rips through the building, killing the majority of Mason's team, including his partner...

As it returns for Season 3, families will be brought together in the vibrant and violent ecotone of the U.S.-Mexico border. International lines done away with following the world's end, the characters must attempt to rebuild not only society, but family as well.