十万个为什么·科学启蒙30篇（3）
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Your Body Turns Up the Heat to Fight Germs
身体调高体温来对抗细菌和病毒
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When germs enter your body, immune cells release chemicals that raise your temperature.
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This fever helps slow down viruses and bacteria while speeding up your healing process.
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You might feel cold and shiver first, even though your thermometer reads higher.
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Drinking water and resting help your body manage the extra work safely.
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A mild fever below 38.5°C usually means your defense system is working well.
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Doctors don’t always treat low fevers because stopping them can delay recovery.
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Wearing light clothes and using a cool cloth feels better than heavy blankets.
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Children often run higher fevers than adults, but most are harmless and short-lived.
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If fever lasts more than three days or goes above 40°C, call your doctor right away.
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Never give aspirin to kids with fever — use acetaminophen or ibuprofen instead.