为你读英语美文·第536期 当我们感冒时，身体在经历什么·永清

主播：永清

录制地点：云南·蒙自

Scene 1 — The Invasion Begins

入侵开始：病毒悄然潜入

Imagine your body as a peaceful castle. Everything is in balance. Every cell, every organ, quietly doing its job.

把你的身体想象成一座宁静的城堡。每个细胞、器官都在默契配合、和平运转。

One day, a tiny virus sneaks in through your nose or throat. It hijacks your cells and begins making copies of itself — like invaders setting up factories inside your city.

某一天，一个小小的病毒悄然潜入鼻腔或咽喉，潜伏入细胞，开始疯狂复制自己，就像入侵者在城内设立据点。

Scene 2 — The Alarm is Sounded

警报响起：免疫系统觉醒

The immune system notices. And boom — it sounds the alarm. Inflammation begins: blood vessels widen, white blood cells rush in. You begin to feel sore throat.

免疫系统发现了异常，立即拉响警报！身体开始“发炎”：血管扩张、白细胞冲向前线。你会开始感觉到嗓子痛。

That sore throat? It’s a battle scar. NK cells(Natural Killer cells) detect infected cells and destroy them, releasing inflammatory signals that cause redness and pain. Pain means your immune system is working hard to protect you.

嗓子痛，其实是身体在战斗的伤痕。NK细胞（自然杀伤细胞）发现病毒入侵后，会主动攻击被感染的细胞，过程中释放炎症因子，引发红肿疼痛。疼，不是坏事，是免疫系统奋力保护你的标志。

Scene 3 — Mobilizing the Defenders

调兵遣将：白细胞全面出动

White blood cells swarm in, including neutrophils, macrophages, and NK cells. Cytokines — the immune messengers — broadcast the signal: “We’re under attack. Reinforcements needed!”

白细胞蜂拥而至，中性粒细胞、巨噬细胞、自然杀伤细胞等先后加入战场。细胞因子像信使一样，发出全城通告：“病毒入侵！请求支援！”

You develop a fever — not because the virus causes it directly, but because your immune system raises the temperature to slow down viral replication and enhance immune efficiency.

你开始发烧，这并不是病毒本身造成的，而是免疫系统故意提高体温（发热），以抑制病毒繁殖、加快免疫细胞反应。

Macrophages engulf viral debris and dead cells, and the byproducts of this cleanup — mucus, nasal discharge — start to appear.

巨噬细胞负责吞噬病毒残骸和死亡细胞，战斗结束后，清理留下的“垃圾”变成鼻涕和痰，开始出现。

Scene 4 — Collateral Damage

代价与误伤：全身疲惫的真相

Your adaptive immune system steps in — T cells seek and destroy infected cells, while B cells produce antibodies to trap the virus.

获得性免疫系统开始接管战场 —— T细胞精准清除被感染细胞，B细胞制造抗体，将病毒包围。

The war is strategic, targeted — but costly. Cytokines surge, energy is drained.

这是一场精准的战斗，但也是高耗能的战争。细胞因子激增，全身能量被调往前线。

That’s why your body aches, even in virus-free zones. That’s why you feel exhausted. It’s not weakness. It’s your army at full power.

你感到肌肉酸痛、疲惫，即使那些地方没有病毒入侵，也是在承担“战斗的代价”。这不是虚弱，而是身体全力以赴。

Scene 5 — The Clean-up Crew

清理战场：咳嗽与鼻涕不是坏事

You start coughing. You produce mucus. You sneeze. That’s your body’s janitor team, cleaning the battlefield.

你开始咳嗽、有痰、打喷嚏——这是身体“清扫小队”行动，负责把病毒和坏死组织从呼吸道清理出去。

Mucus isn’t bad — it’s a garbage truck, collecting dead viruses and cells.

痰不是坏东西，它像“垃圾车”，帮你清除病毒和死去的细胞。

Scene 6 — Why You Feel So Tired

极度疲惫：省电模式已开启

You feel sleepy, foggy, and emotionally low. That’s your body forcing you to slow down — to heal.

你觉得昏昏欲睡、精神不济，是身体强制让你慢下来，集中能量修复。

It’s like switching into battery-saving mode. Your body is telling you: “Now is the time to rest.”

就像开启“省电模式”，身体在说：“先休息，专注打赢这场仗。”

Scene 7 — Victory Is Quiet

静悄悄的胜利：康复正在进行中

One morning, you wake up feeling… better. The war is mostly over. No more fever, just a little phlegm.

有一天早上醒来，你感觉好多了，发烧退了，只剩点痰。战斗基本结束。

But healing still continues. The immune system is cleaning, rebuilding, reinforcing.

但康复仍在继续，免疫系统清理残留，修复组织，加强防御。

后期制作：永清

文章，音乐，图片非商业用途，版权归作者或版权方所有

我们生活在世界各地，从事不同职业，和你分享我们喜欢的美文。我们的公众号是：“为你读英语美文”。