6Chapter 6: Sticky Mucus Marshes
19Chapter 19: The Fever Frenzy
7Chapter 7: Cilia Highway
20Chapter 20: The Immune Cell March
8Chapter 8: Battle at Nose Gate
21Chapter 21: The Antigen Recognition Test
9Chapter 9: Saliva Stream Rapids
22Chapter 22: The Vaccine Vault
10Chapter 10: Lymphatic Lagoon
23Chapter 23: The Lungs’ Last Stand
11Chapter 11: Gut Garden University
24Chapter 24: The Last Line of Defense
12Chapter 12: Probiotic Seed Packets
25Chapter 25: The Final Defense
13Chapter 13: Harmful Microbe Field
26END
