第 3 集: 天真T細胞在對抗流感病毒的戰鬥中逃離，同時恐懼著自己的無能。
2018年7月22日 播出
Naive T Cell is patrolling the body for influenza virus proliferation. But since he’s never taken on the enemy before, he’s completely terrified and useless. He finally ends up fleeing the battlefield where White Blood Cell (Neutrophil) and the veteran Killer T Cells are fighting. Naive T Cell is filled with self-loathing until Dendritic Cell sees him and speaks to him kindly. (Source: Wikipedia)