Jova and Wenli shrink to microscopic size and find themselves inside the bustling world of Kairo's own body—where invisible invaders threaten every corner. Guided by the mighty Captain Immuno, they wield Soap Scepters and Sanitizer Satchels to master hand-washing, mucus-clearing cilia highways, probiotic gardens, sneeze shields, and disinfectant drones. Along the way, they discover how their everyday habits—washing hands for twenty seconds, covering coughs, staying home when sick, and vaccinating—become superpowers against harmful microbes. Germ Fighters Unite is a playful, action-packed adventure that empowers children ages 5–10 to protect themselves and their community with simple, science-backed habits.