Being around smoke profoundly degrades the immune system, as it dries out your nasal passages and paralyzes cilia, which sweeps cold and flu viruses out of the nasal passages.

• 吸烟能大大降低人体的免疫力，因为吸烟能使鼻道干燥，使抵御流感和感冒病毒的上皮细胞纤毛麻痹。