The story begins with a patrolling the body. He is inexperienced and easily terrified when he encounters cells infected by the Influenza Virus . These infected cells behave like zombies, attempting to spread the virus to others.
Naive T Cell, Macrophage (major appearance), Dendritic Cell. Hataraku Saibou (TV) Episode 3
Unlike bacteria, viruses must "hijack" a host cell's machinery to reproduce, which the anime depicts as the cells turning into "zombies". The story begins with a patrolling the body
With the combined efforts of the White Blood Cells, Macrophages, and the now-activated T Cells, the infection is cleared. 🔬 Biological Concepts Explained Naive T Cell, Macrophage (major appearance), Dendritic Cell
A Macrophage appears, wielding a large weapon to clear out the virus. She identifies the virus as Type B and contacts Helper T Cell for reinforcements.
For fan theories and medical deep-dives, check out the episode discussions on Reddit's r/anime .