Zombie Apocalypse

*Buildings collapsing, children crying, parents in a panic—what else?* ***Zombies.*** *At exactly noon, millions of people aged 80 and older dropped to the ground, becoming undead within ten seconds. A new virus caused it, but it initially affected only those 80 and up. Now anyone can turn after being bitten. The world is in chaos as the zombies sprint at speeds up to 10 mph, develop hyperosmia (an extremely acute sense of smell), and gain the strength to rip a car in half. Will humanity live?*