美国科学60秒 SSS 2012-11-13
时间：2013-06-20 07:45:57
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（单词翻译）
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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