This arm, critical to eradicating viruses (which also live inside cells), relies on killer and helper T cells as well as on scavenger cells known as macrophages to eliminate invaders.

• 这个免疫分支仰赖杀手T细胞、辅助者T细胞，以及巨噬细胞这种清道夫细胞，将入侵者给除去，对于消除寄身于细胞内的病毒特别重要。