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I've always thought that when I get a fever, it's my body trying to make things uncomfortable for the invading pathogen. And that's often true - higher temperatures can inhibit¹ the bad guys' ability to replicate². But my fever may actually be a one-two-punch. In addition to slowing down the invader³, the heat helps the immune system recruit more troops for a counter-attack. That finding appears in the Journal of Leukocyte Biology.

Researchers warmed up one group of mice to body temperatures of about 103 degrees Fahrenheit⁴. They left another group at normal core temperature - about the same as ours. Then they injected both groups of mice with an antigen, a substance that attracts the attention of the immune system.

Blood samples taken three days later revealed that the feverish⁵ mice had nearly twice as many killer⁶ T cells: the kind of immune cells that can hunt down infected cells or tumor⁷ cells, and slaughter⁸ them.

So when you're sick and you get the chills, the authors say, your body may be trying to tell you to hop⁹ under some blankets. Lie down, warm up and send a message. The heat is on.

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1 inhibit
vt.阻止，妨碍，抑制
参考例句：
Don't let ego and greed inhibit clear thinking and hard work.不要让自我和贪婪妨碍清晰的思维和刻苦的工作。 They passed a law to inhibit people from parking in the street.他们通过一项法令以阻止人们在街上停车。

2 replicate
v.折叠，复制，模写；n.同样的样品；adj.转折的
参考例句：
The DNA of chromatin must replicate before cell division.染色质DNA在细胞分裂之前必须复制。 It is also easy to replicate,as the next subsection explains.就像下一个小节详细说明的那样，它还可以被轻易的复制。

3 invader
n.侵略者，侵犯者，入侵者
参考例句：
They suffered a lot under the invader's heel.在侵略者的铁蹄下，他们受尽了奴役。 A country must have the will to repel any invader.一个国家得有决心击退任何入侵者。

4 Fahrenheit
n./adj.华氏温度；华氏温度计(的)
参考例句：
He was asked for the boiling point of water in Fahrenheit.他被问到水的沸点是华氏多少度。 The thermometer reads 80 degrees Fahrenheit.寒暑表指出华氏80度。

5 feverish
adj.发烧的，狂热的，兴奋的
参考例句：
He is too feverish to rest.他兴奋得安静不下来。 They worked with feverish haste to finish the job.为了完成此事他们以狂热的速度工作着。

6 killer
n.杀人者，杀人犯，杀手，屠杀者
参考例句：
Heart attacks have become Britain's No.1 killer disease.心脏病已成为英国的头号致命疾病。 The bulk of the evidence points to him as her killer.大量证据证明是他杀死她的。

7 tumor
n.（肿）瘤，肿块(英)tumour
参考例句：
He was died of a malignant tumor.他死于恶性肿瘤。 The surgeons irradiated the tumor.外科医生用X射线照射那个肿瘤。

8 slaughter
n.屠杀，屠宰；vt.屠杀，宰杀
参考例句：
I couldn't stand to watch them slaughter the cattle.我不忍看他们宰牛。 Wholesale slaughter was carried out in the name of progress.大规模的屠杀在维护进步的名义下进行。

9 hop
n.单脚跳，跳跃；vi.单脚跳，跳跃；着手做某事；vt.跳跃，跃过
参考例句：
The children had a competition to see who could hop the fastest.孩子们举行比赛，看谁单足跳跃最快。 How long can you hop on your right foot?你用右脚能跳多远？